Paddy field in bhutan are mostly located along the river basins. why?

This is where they grow the best.

Explanation:

Factors such as climate and location are taken into consideration when determining why something is where it is.

These paddy fields are located along the river basins because this is where it best grows, along with the climate of the area Bhutan is.

"The main religions of the Maurya and Gupta empires were Hinduism, Buddihsm, and Jainism. The Mauryans had been Buddhists and the Gupta monarchs were Hindus. Ashoka, Chandragupta's grandson was Buddhist but did not force Buddhism on the people. During this time, religious toleration was in order." I don't know if this helps but I hope it does. This isn't my answer either, all credits belong to https://globalprogect.weebly.com/religion.