How does the biological carbon cycle return carbon dioxide back to the atmosphere?

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A Through photosynthesis by green plants
B Through respiration by plants and animals
C Through the formation of fossil fuels like coal
D Through the calcification of marine shells

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Answer: B. Through respiration by plants and animals

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• Explanation: B) Through respiration... is correct because living organisms break down glucose and release carbon dioxide back as a byproduct.

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How does the biological carbon cycle return carbon dioxide back to the atmosphere?

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