What did organisms have to do once oxygen was introduced into the atmosphere ?
A. Live or die
B. Evolve
C. Erosion
D. Move to a location more suitable for living

Answer :

Bomberanian

Answer:

Evolve

Explanation:

Since organisms were not used to oxygen they could not survive. Organisms can't erosion, and they can't move to another planet, so they had to evolve.

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