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

Dulce Adams

17 May, 07:59

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

+2

Answers (2)

Know the Answer?

Jameson Rice · Answer 1

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

Kevin Joyce · 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