The correct option is D Avoiding the burning dry leaves, fodders
Just as the glass in a greenhouse holds the sun’s warmth inside, the atmosphere traps the sun’s heat near the earth’s surface and
keeps it warm. This is called the natural greenhouse effect.
If the amount of CO2 in air increases, natural green house balance is disturbed and the atmosphere gets heated. This causes global warming.
There are several ways to reduce global warming e.g. by minimising automobiles, by afforestation, by avoiding burning dry leaves, fodders etc.