A. The act of laughing is actually good exercise. In an average laugh, the heart, lungs, and other organs get a brief workout. Laughing can clear up the respiratory system and speed up the heart rate. If the laugh is especially strong, it loosens muscles in the face, arms, and legs.
1. Underline the sentence that directly states the main idea made about laughter in paragraph A.
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The act of laughing is actually good exercise .
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Laugh can clear up the respiratory system and speed up the heart rate
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