Which of these protects the earth from harmful radiation when found in the stratosphere, but is a pollutant at lower altitudes?

The atmosphere is like a blanket for our planet, within this atmosphere, there's a layer called "The ozone layer" which protects our planet from most of the sun's harmful rays. And yes, the ozone layer has holes, because of the pollution.

моля да ми помогне с английски език аз не разбирам

molya da mi pomogne s angliĭski ezik az ne razbiram

answer(c) carved on a babylonian clay tablet that showed earth as a flat circular disk;