60.5k views
1 vote
What was the major contributor of oxygen to earth's early atmosphere ?

A) photosynthesis

B) Organic respiration

C) ozone decomposition

D. Decomposition of ocean water

Explain your answer in your own words

User Awy
by
4.6k points

2 Answers

3 votes
The answer is A) photosynthesis
User Bastien Beurier
by
5.1k points
3 votes
I this the answer is B
User Jausen Brett
by
4.8k points