Which of the following absorbs the insolation from the sun and preserves the earth's radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?

(A) Dust
(B) Water vapour
(C) Ozone
(D) Nitrogen

Which of the following absorbs the insolation from the sun and preserves the earth’s radiated heat, thus acting like a blanket allowing the earth neither to become too cold nor too hot?