Where is freedom in the economic spectrum?

What are three uses of the yangtze river by the people living among the river

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

The principle of checks and balances is based on the notion that