Explain the region(India's river system and mountains OR Egypt and Mesopotamia's river valleys. These are two options. I just need one of them) And explain at least 2 geographic features that have had an impact on the development of that region.

(I actually have to write an essay on it. But i am not asking for such a huge thing. I just need some ideas on what i should write about. Thank you for taking your time reading this :)