Ancient India gave us buddisum.It's a religion.
The Aryans brought with them Hinduism.
It was their religion. They used it the same way that we use ours: to define those things which cannot be defined or explained.
Yes, and it is so...
With their religion.
Karma and Samsara are concepts from the ancient Hindu religion, which is still practiced in modern India.
Most were Hindu
buddians
Hinduism is the most practiced religion. It has been prevalent from the start.
Yes, it did. No ancient society ever existed that did not believe in the supernatural. For a few details, see: Religion in ancient India and the Indus
Hindoism
Brahmanism is a religion that was founded in ancient India. Before Brahmanism there was Vedism. The class of priests were called Brahmas.