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20-01-2021
Biology

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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
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Respuesta :

summanmlk09 summanmlk09

20-01-2021

Answer:

Oa

Explanation:

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

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