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.
</span>
<span>C) ships could then take advantage of the currents to speed up travel </span>
Answer:
12 Sides
Explanation:
Since an interior is 150 degrees,it's adjacent exterior angle is 30 degrees
