Read the passage and answer the question:

The presence of grain and representations of bulls suggest that agriculture was practiced in ancient times. However, the specific methods used are unknown. It is possible that seeds were broadcasted on ploughed lands or that a plow pulled by a bull was used. Further research is needed to shed more light on this topic.

What did the two sets of furrows at right angles to each other found in the fields of some Harappan sites indicate?

Two different crops were grown together.

The correct answer is Option 3 - Two different crops were grown together.

Moreover, terracotta models of the plough have been found at sites in Cholistan and at Banawali (Haryana). Archaeologists have also found evidence of a ploughed field at Kalibangan (Rajasthan), associated with Early Harappan levels. The field had two sets of furrows at right angles to each other, suggesting that two different crops were grown together. Archaeologists have also tried to identify the tools used for harvesting. Did the Harappans use stone blades set in wooden handles or did they use metal tools?