Actions, thoughts, and feelings that are harmful to yourself or others define behavior

Cost and benefit in economic example

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.

What period of history refers to the time when people did not have written records