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Which of the following is the primary source of oxygen in the Earth's atmosphere? OA plants OB animals OC factories OD bacteria Reset Submit
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20 votes
Which of the following is the primary source of oxygen in the Earth's atmosphere?

OA
plants
OB
animals
OC
factories
OD
bacteria
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User Mithu
by
6.1k points

1 Answer

7 votes

Answer:

Oa

Step-by-step explanation:

bcz primary is a form of plants type so thats why its OA

User Semihcan Doken
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5.9k points
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