<span>During the day the earth absorbs heat, and at night it releases heat into the atmosphere. When it is cloudy, the clouds keep the heat from radiating off into space. The clouds absorb then reflect the radiated heat back to the earth. </span>
Retrieved from memories of a journey by Calistrat Hogas. Please<span>
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It is (A) because an autobiography is a self written story about yourself.
I believe it's a metaphor.