Please choose the correct answer to the question: 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?

Answer1: It may be used as part of a sugar in a plant. Answer2: It may become part of a protein in an animal. Answer3: It may be consumed as a fossil fuel is burned. Answer4: It may be decomposed into carbon and oxygen by a bacterium.

Answer format: answer1/answer2/answer3/answer4