Ecosystems can be changed by natural events or by human actions. Which is NOT a natural event?

A. A forest fire started by lightning

B. pollution from a factory entering a river

C. a beaver building a dam in a river

D. An earthquake

Question

Biology

Maximo Kaiser

13 April, 08:31

Ecosystems can be changed by natural events or by human actions. Which is NOT a natural event?

A. A forest fire started by lightning

B. pollution from a factory entering a river

C. a beaver building a dam in a river

D. An earthquake

+1

Answers (2)

Know the Answer?

Hamlet · Answer 1

C. Pollution is man made if it weren't for our factories there wouldn't be this much pollution

Yasmin Larsen · Answer 2

Hi! The answer would be B. pollution from a factory entering a river because humans built the factory so that it would drain into the river, therefore it is unnatural.

Ecosystems can be changed by natural events or by human actions. Which is NOT a natural event?A. A forest fire started by lightningB. pollution from a factory entering a riverC. a beaver building a dam in a riverD. An earthquake

Ecosystems can be changed by natural events or by human actions. Which is NOT a natural event?

A. A forest fire started by lightning

B. pollution from a factory entering a river

C. a beaver building a dam in a river

D. An earthquake