Snofall occurs when?

(A) Water droplets freeze as they fall to the ground
(B) Raindrops are carried up by draughts in aie
(C) Dew point of air is below freezing point
(D) Air is highly moist and raises due to covaction

What is the importance of ozone in the atmosphare?

(A) It provides protection against ultraviolet radiation
(B) It provides condensation nuclei
(C) It creates the greenhouse effect on earth
(D) It helps scatter blue light

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