Here were the choices on that question:
a. poverty
b. lack of adequate rivers
c. mountains
<span>d. richness
The answer is D. richness. Based on A Companion to World History, the African Sahel can be a corridor of communication between Nile and Niger valleys but did not materialize. The reason was the richness of Sahel that it that it can provide for itself even without trade.
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The change is due to the motion of the Earth in its orbit around the sun
Answer:
Existence itself is not homogeneous. It is heterogeneous. That means there are various kinds and degrees of purity.
O=height of monument
tan32= O/405
O=tan32/405
height of monument=0.0015 ft.
Straight to the surface of the earth and cause some serious problems
