how did I oxygen is created..?
what is the help of oxygen?
what will happen if oxygen is not available?......
Answers
Answered by
1
Answer:
Explanation:
During evolution oxygen from
Answered by
3
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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