Answer:
When the Aryans arrived in the Indian river valleys, they brought with them a pastoral way of life, and they relied heavily on cattle for their livelihood. Over time, they became farmers, built settlements, and developed a complex social structure known as the caste system. They did not adopt Dravidian customs and language, but rather imposed their own culture and language on the indigenous population. There were certainly conflicts over land and resources, but the Aryans did not establish a powerful military until later in their history. They did not settle along the coasts and become fishermen, as the river valleys were more suitable for agriculture.