Answer:
mountains keep people from different areas apart
Explanation:
The dust bowl is a cause
The drought in the midwest is a cause
Creating social security helped end great depression
Over production was a cause
Im gonna say winning the first world war did since it generally did
And demand fell after the war is a cause
The spread of Islam into the Maghreb is an example of Arab invasion of North Africa. The Arabs send Muslim army to Maghreb (modern morocco) to battle against Byzantines and allies, and finally conquer most of the North Africa were many Berbers (locals of Maghreb) join the Muslim army. After Arabs gain more power in the region, the Berbers are now ready to adopt and convert to Islam as well as the Arabic culture.
B) There were more animals capable of being domesticated in America than in Europe, Asia, and Africa?