The best and most correct answer among the choices provided by your question is the first choice or letter A. The conclusion that could be drawn from the paragraph is that "<span>in a greenhouse, the Sun's heat is trapped by the glass."
Because of this greenhouse effect, global warming takes place. It is an abnormal rise of temperature which results to the melting of our polar ice caps.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.
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