How can one type of rock become many different types of metaphoric rock?

How did the europeans design the national borders of africa? why?

Reason i shouldnt turn back if i'm lost in the wilderness need fast

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire