Use reasoning to lead to the answer of the following question:
What helps a human to move?\nOptions:\n- two arms\n- drinks\n- stupidity\n- one body\n- muscles
 Reasoning process:
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Muscles mean a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or the position of parts of the body. Muscles helps a human to move as it has the ability to contract, producing movement in or the position of parts of the body. Therefore, the final answer is muscles.
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