How does carbon cycle through the ocean, atmosphere, soil, and biosphere?

Carbon moves from one storage reservoir to another through a variety of mechanisms. For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. Respiration, excretion, and decomposition release the carbon back into the atmosphere or soil, continuing the cycle.
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1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged