American and european former slaves were brought back to africa mainly in what country?

a. liberia
b. south africa
c. angola
d. nigeria

What is the earth matial ot igneous rock

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Describe how ocean currents can affect a moving object ❕❕❕