maintains oxygen composition on Earth.

Photosynthesis

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Transpiration

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Nitrification

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Solution

The correct option is A Photosynthesis
Plants take in carbon dioxide and give out oxygen during photosynthesis. Thus, photosynthesis helps in maintaining the level of oxygen in the atmosphere.

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Similar questions

Oxygen cycle maintains the air composition on Earth.

State true or false.
Oxygen cycle maintains the air composition on Earth.

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