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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Choose your answer from: 1). It may be used as part of a sugar in a plant.. 2). It may become part of a protein in an animal.. 3). It may be consumed as a fossil fuel is burned.. 4). It may be decomposed into carbon and oxygen by a bacterium..