What occupation of the Indians was favored by the nature of India? What favored?

The climate of India in ancient times, as now, was quite hot and humid, in addition, most of the country is covered with impenetrable jungle, where wild animals live, including poisonous snakes. The main occupation of the ancient Indians was agriculture, they grew: barley, vegetables, wheat, rice, etc. Sugar was also grown from sugar cane. The Indians knew how to breed livestock: chickens, sheep, goats. They tamed animals, including dogs. In addition, various crafts were developed in ancient India: weaving, jewelry work, stone carving, ivory, etc.