Which statement best describes a negative effect of human activity on Africa’s waterways?

Question

Dams have changed river flows, which has led to erosion.
The use of rivers to water crops has led to droughts.
Population growth has led to the destruction of rivers.
The use of river transportation has harmed water quality.

Answer 1

The statement that best describes a negative effect of human activity on Africa’s waterways is:

Dams have changed river flows, which has led to erosion.

This statement highlights a specific consequence of human activities, such as dam construction, that disrupts the natural flow of rivers, subsequently leading to erosion and other ecological impacts.