Which of the following add/adds carbon dioxide to the carbon cycle on the planet Earth ?
1. Volcanic action
2. Respiration
3. Photosynthesis
4. Decay of organic matter
Select the correct answer using the code given below
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A.
1 and 3 only
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B.
2 only
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C.
1, 2 and 4
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D.
1, 2,3 and 4
Correct Answer:
C. 1, 2 and 4
Explanation:
Natural processes like volcanic eruptions, respiration, and the decomposition of organic materials add carbon dioxide to the Earth's carbon cycle. Conversely, plants absorb carbon dioxide and release oxygen during photosynthesis.
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