Which of the following is true of the planet Earth?
The Earth revolves around the Sun.
The Earth is the third planet from the Sun.
The Earth is the only planet that is orbited by exactly one moon.
The Earth is the smallest planet in the solar system.

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