Answer:
It is believed not
Explanation:
The current shapes of the continents align with eachother in a way that would lead us to believe they were once part of a whole mass, cientists call this the pangea theory something that is further supported by the correlating geography of each continent.
Rivers were attractive locations for the first civilizations because they provided a steady supply of drinking water and made the land fertile for growing crops. Moreover, goods and people could be transported easily, and the people in these civilizations could fish and hunt the animals that came to drink water.
The natural vegetation regions of Sub-Saharan Africa are typically in places that are far away from any expansive territories of desert, such as by the coastline.
Mongolia is the correct answer :)