Someone please help

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

What is the reason for the “scramble for africa”?

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.