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All of these are natural events that could alter an ecosystem EXCEPT -

1 answer:

8 0

Answer:
A) Burning of fossil fuels

Explanation:
Burning fossil fuels is an anthropogenic activity, meaning humans do it. Even though humans can create wildfires, for the most part it is a natural and good thing for soil; humus - dead organic matter - is good for top soil. Flood and Volcanic eruption are both done by mother nature.

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