In one of the steps of the carbon cycle, a person exhales a molecule of carbon dioxide (CO2) into the atmosphere. Which of the following is most likely to happen next to the atom of carbon in this molecule?
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Available choices: +It may be used as part of a sugar in a plant.; +It may become part of a protein in an animal.; +It may be consumed as a fossil fuel is burned.; +It may be decomposed into carbon and oxygen by a bacterium.;
It may be used as part of a sugar in a plant.