Question

Which sphere contains the air we breathe? A. atmosphere B. lithosphere C. hydrosphere D. magnetosphere

Answer 1

The answer to this is atmosphere. 

The atmosphere is the layer of air that surrounds the Earth and is comprised mainly of nitrogen and oxygen. 

So that's why the sphere that contains the air we breathe is atmosphere.

Hope this helped :)
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Answer 2

Atmosphere contains the air we breathe