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Yawning helps in refreshing a lazy body.... if you observe, you yawn when you feel uninterested or lazy.... even while sleeping, because of our body tired.tiredness, we yawn nd eventually we go to sleep cause thr body does not have that much energy left to boost up.... plz mark this as te best!!!
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When we are tired our body needs some rest which actually means our body needs more oxygen to over come the fatigue feeling. We yawn to intake more oxygen but it is a temporary settlement. To overcome tired ness our body needs sleep.
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