The meaning of this statement is that the changes that the ozone layer experiences might stem from the cycles in its natural makeup. The change in shape might also arie from man's activities which is unnatural.
The statement above means that the changes in shape that the ozone layer experiences may stem from the way it is designed. These are the natural and expected changes that occur over time.
However, some of the other changes are not natural and this can be because of man's activities that cause a forced change. The latter is destructive and should be curbed.
Learn more about the ozone layer here:
https://brainly.com/question/520639
#SPJ1
