Q.

Plants and animals consume oxygen for respiration and produce carbon dioxide. How is this carbon dioxide consumed to balance the carbon dioxide—oxygen balance.

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a

Plants take in carbon dioxide and exhale oxygen during photosynthesis

b

Oxygen comes into the earth’s atmosphere from outside

c

People stop breathing for some time

d

Plants can be burnt to release oxygen

answer is C.

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Detailed Solution

During Photo synthesis process plants consume CO2  gas and release oxygen gas in this manner carbondioxide-oxygen gases are balance in atmosphere.
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