Question

the rain shadow region is found in which part of brazil​

Answer 1

The rain shadow region in Brazil is called as Sertao. This is located in the north-eastern Brazil. Basically, rain shadow is the dry land that is on the leeward side of the mountain areas. The mountain will not allow the rain to pass through and produce rain and this would have a shadow of dryness next to it.

Answer 2

The location of rain shadow region in Brazil is, regions of "leeward side of a mountainous area."