Ijust need to know what pic i need to draw or what diagram

How does the bare soil surface type affect the amount of runoff

The caste system in india was used for what purpose? a) to ensure that all people had an adequate income b) to prevent the rich from taking too much power c) to provide social control and conformity according to one’s birth d) to draft a military capable of defending india from mongol invasion

This desert is found in the northern part of africa and covers 3.5 million square miles.