Question

how did I oxygen is created..?
what is the help of oxygen?
what will happen if oxygen is not available?......
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Answer 1

Answer:

Explanation:

During evolution oxygen from

Answer 2

Answer:

oxgen is vary important

Explanation:

if it is not persent we cannot survives.

oxygen help in breating mechanisms

oxygen not created .it is naturl occouring in air.trees provid a large amount of oxygen

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