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AleksAgata [21]
3 years ago
14

BRAINLIEST IF CORRECT 45 POINTS REPORTED IF WRONG OR TROLL

Biology
2 answers:
Bond [772]3 years ago
4 0

Explanation:

The Cambrian Explosion happened on Earth around 541 million years ago. As many major groups of animals started to appear after this event, high levels of oxygen would have been necessary in the atmosphere in order to sustain the lives of these animals until modern-day times. (A)

fenix001 [56]3 years ago
3 0

Answer:

the answer is

Explanation:

A. becuase  I gogled it

hope it helps!!!

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