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africa
The desert, coastline, rivers, and plateaus of Africa create physical barriers that did not allow for the migration of people or animals into Africa. A disease barrier formed by parasites carrying deadly diseases killed most of the people and animals that did manage to get in Africa. Africa’s wide-ranging and irregular climate made agriculture and travel difficult. The desert, coastline, rivers, and plateaus of Africa created physical barriers that did not allow for the
know when to plant gardens. Also, many years of rainfall would erode soil, while many years of drought made it impossible to grow food without a water resource. Travel was not easy either. If a person was traveling through the middle, northern portion of Africa and a drought occurred, it would be likely that they would die of dehydration because most of the natural water resources are far from the mid-land mass of northern Africa.

