B. The Sahar desert. The people from the south east of the continent migrated to other parts of Africa but not north Africa because the Sahara was in their way. This led to the ottomans to easily lay claim to North Africa and develop a Islamic and Arabic like culture.
The coast of california on the western side of the state has a moist climate, while eastern side is a desert. it could cause the difference in: c. the west side is closer to the equator than the east.
