Q. What was the most prominent reason of arrival of Indo-Aryans from central Asia , possibly from the south of the Urals and East of Caspian Sea?
Answer: They were defeated by their Indo European neighbors
Notes: Getting defeated by European neighbor’s is the main reason for the Indo-Aryans to move away from that area. They came to India possibly from the south of the Urals and East of Caspian Sea.

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