Use reasoning to lead to the answer of the following question:
What mammal has a diaphragm?\nOptions:\n- homunculus\n- drugstore\n- human\n- woman's body\n- person's chest
 Reasoning process:
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Human is a human being or relating to or characteristic of humankind and has different body parts. Human, a mammal has a diaphragm. Therefore, the final answer is human.
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