Answer:
The best explanation is:
Populations are greater in fertile areas that are close to freshwater sources, which is why more people live near rivers.
Explanation:
We can see in the population map that the highest populations are located in the areas which are fertile areas area close to freshwater sources, so people prefer to settle down near rivers. The reason is that fertile land along the river provide a perfect land for crop production. Another reason is transportation through water, which is essential for international trade. Fresh food also contributes to the reason.
