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>
The answer you are looking for is "<span>a. elements of ecosystems are mutually dependent on each other ".</span>
Earth is the only planet that habours life.
So the answer to the question would probably be no.
<h3>I hope it's helpful for you ✌️✌️✌️✌️❤️✌️❤️</h3>
