Which statement best describes a negative effect of human activity on Africa’s waterways? A. Dams have changed river flows, which has led to erosion. B. The use of rivers to water crops has led to droughts.

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

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

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