Carbon dioxide and oxygen are balanced in the atmosphere by _____________.
A
combustion & galvanisation
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B
ozonolysis & combustion
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C
respiration & combustion
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D
photosynthesis & respiration
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Solution
The correct option is D photosynthesis & respiration Plants take up carbon dioxide from air and give out oxygen during photosynthesis. Animals take up oxygen and release carbon dioxide during respiration. This maintains a balance between oxygen and carbon dioxide in the atmosphere.