What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?(1 point)

Question

rust deposits
anaerobic organisms
fossil record
stromatolites

Answer 1

anaerobic organisms, because they are organisms that need oxygen.

Answer 2

Thank you!

Answer 3

Fossil record

Answer 4

I feel Anaerobic Organisms are correct because Apple Ann is right; they need oxygen