Asap where does the most geologic activity (including volcanoes and earthquakes) occur? within continental plates across two plates in the middle of oceanic plates where two plates meet

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