Archaeo-botanists study ancient plant remains such as wheat and barley grains. Archaeo-zoologists analyze animal bones including sheep and goat remains. Dietary plant analysis focuses on plant consumption, while dietary animal analysis examines animal-based food habits. Therefore, the correct matching is 1-b, 2-a, 3-c, and 4-d, making Option C correct.

Archaeological evidence from charred grains, seeds, animal bones, fish remains, and fowl bones demonstrates a broad-based subsistence economy. This confirms that Harappans consumed foods from both terrestrial and aquatic environments. Therefore both the Assertion and Reason are true, and the Reason correctly explains the Assertion. Hence Option D is correct.

Archaeological evidence shows that wheat and barley formed a significant part of the Harappan diet. Saddle querns were used for grinding these cereals and were often stabilized in earth or mud. Statement 3 is incorrect because the Harappans belonged to the Bronze Age and did not use iron mills. Therefore Statements 1, 2, and 4 are correct, making Option A the correct answer.

Lentils and chickpeas were among the crops cultivated and consumed by Harappan communities. Their remains have been recovered from archaeological sites and studied by archaeo-botanists. There is no evidence that they were solely imported from Mesopotamia. Therefore Option B is incorrect, while the remaining statements accurately reflect archaeological findings.

The agricultural cycle begins with cultivating crops such as sesame in ploughed fields. After maturation, crops are harvested using stone or metal tools. The harvested grains are then processed and ground using saddle querns before consumption. Therefore the correct chronological sequence is Growing → Harvesting → Processing, corresponding to Option D.

Archaeological evidence shows regional variation in crop cultivation across the Harappan world. Millets have been recovered from sites in Gujarat, while rice remains occur only in limited quantities. These findings indicate that agricultural practices adapted to local environmental conditions. Therefore, both the Assertion and Reason are true, and the Reason correctly explains the Assertion.

Archaeo-zoologists study animal bones to identify domesticated and wild species. Evidence indicates that cattle, sheep, goat, buffalo, and pig were domesticated by the Harappans. Bones of wild species such as boar and deer have also been recovered. However, bone evidence alone cannot prove that cattle and sheep were used exclusively for draught purposes. Therefore Statements 1, 2, and 4 are correct, while Statement 3 is incorrect, making Option A the correct answer.

Domesticated animals include cattle, sheep, and pigs. Wild species recovered from sites include boar, deer, and gharial. Fish and fowl represent aquatic and avian food resources. Bulls and oxen are linked to agricultural labour through seal depictions and archaeological interpretation. Therefore, the correct matching is 1-c, 2-d, 3-b, 4-a.

Fish remains recovered from numerous Harappan settlements demonstrate that aquatic resources were regularly exploited. This evidence supports the conclusion that fishing contributed to subsistence alongside agriculture and animal husbandry. Therefore the Assertion is true, the Reason is also true, and the Reason directly explains the Assertion. Hence Option A is correct.

Animal bones indicate that cattle, sheep, goats, buffaloes, and pigs were domesticated by the Harappans. Fish and fowl also formed part of their diet. Therefore Option B is incorrect because it ignores clear evidence for animal husbandry. Options A, C, and D accurately reflect current archaeological interpretations of Harappan subsistence.

The passage explicitly states that while grain remains prove the prevalence of agriculture, reconstructing the exact methods used by Harappan farmers is difficult. Questions such as whether seeds were broadcast on ploughed land remain unresolved. Therefore Option C directly reflects the challenge described in the passage and is the correct answer.

Since no surviving wooden ploughs have been recovered, archaeologists rely on indirect evidence. Representations of bulls on seals and terracotta sculptures suggest the importance of cattle. Combined with terracotta plough models, this allows researchers to infer that oxen were likely used for ploughing. Therefore Option D is correct.

Excavations at Kalibangan revealed a ploughed field with two sets of furrows intersecting at right angles. Archaeologists interpret this arrangement as evidence that two crops were cultivated simultaneously, indicating mixed cropping practices. Therefore Statements 1, 2, and 3 are correct. Statement 4 is incorrect because the field did not contain only parallel furrows. Hence Option A is the correct answer.

The excavated field at Kalibangan contained two intersecting sets of furrows. Archaeologists interpret this pattern as evidence that two crops were cultivated simultaneously. Such cultivation represents mixed cropping. Therefore both the Assertion and Reason are correct, and the Reason directly explains the Assertion. Hence Option C is the correct answer.

Harvesting tools may have consisted of stone blades or metal implements. Saddle querns were made from hard igneous rock or sandstone suitable for grinding. Cooking vessels were produced in stone, metal, and terracotta. Plough evidence comes from terracotta models found at Banawali. These associations yield 1-b, 2-a, 3-d, 4-c, making Option D correct.

Archaeologists have not conclusively determined the exact harvesting tools used by Harappans. Some suggest stone blades fixed into wooden handles, while others propose metal tools. Therefore Option A is incorrect because it presents an unproven and absolute claim. Options B, C, and D accurately reflect current archaeological interpretations of food processing and harvesting technology.

Most Harappan settlements were located in semi-arid regions where irrigation was important. Archaeologists suggest that well water may have been used for agriculture. However, abundant mature Harappan canal networks have not been found in Punjab and Sind. Some scholars believe ancient canals may have silted up over time. Therefore Assertion is true, but Reason is false.

Archaeologists have identified canal traces at Shortughai, demonstrating the use of irrigation channels. Similar evidence has not survived in Punjab and Sind. A widely accepted explanation is that ancient canals in these regions gradually filled with silt and disappeared from view over time. Therefore Option D is the most reasonable interpretation.

Many Harappan settlements existed in semi-arid regions where water availability was a significant concern. As a result, irrigation and water-storage systems became important. Dholavira's reservoirs demonstrate sophisticated water-management strategies. These examples show that Harappan infrastructure was shaped by environmental conditions. Statement 3 is incorrect because abundant year-round rainfall was not characteristic of most Harappan regions. Therefore Statements 1, 2, and 4 are correct, making Option A the correct answer.

Harappan settlements were generally located in semi-arid zones where water management was essential. Archaeological evidence points to the use of wells, canals in certain areas, and reservoirs at Dholavira. Therefore Option B is incorrect because it assumes abundant rainfall eliminated the need for irrigation, which contradicts environmental and archaeological evidence.