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BiologyBiology
11 August, 04:04

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

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Answers (2)
  1. 11 August, 04:08
    0
    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.
  2. 11 August, 04:12
    0
    C. Pollution is man made if it weren't for our factories there wouldn't be this much pollution
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Home » Biology » 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
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