Answer:
They formed a natural barrier that helped protect people living in the Nile River valley. They also provided the ancient Egyptians with a source for precious metals and semi-precious stones.
Explanation:
The desert is extremely hot and dry. Most people avoided them, yet the deserts did play one important role in the settlement of Egypt and Kush. They formed a natural barrier that helped protect people living in the Nile River valley. The deserts did not support large settlements, and few invaders wanted to cross them.
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