Do not open that link it takes all your information
They moved out of the foothills and into the plains (near rivers). The rivers provided more opportunities for food growth.
Answer:
US factories produced aircraft for the war effort.
US troops at the front relied on trucks to keep them supplied.
Explanation:
Answer:
The slave trade had devastating effects in Africa. Economic incentives for warlords and tribes to engage in the slave trade promoted an atmosphere of lawlessness and violence. Depopulation and a continuing fear of captivity made economic and agricultural development almost impossible throughout much of western Africa.