the amounts of daylight the heights of ocean waves the numbers of storms the sizes of clouds
I gave my students this multiple choice question: Which of these is the greatest change that can be observed between summer and winter?

Only one answer is correct among these 4 choices:
- the amounts of daylight
- the heights of ocean waves
- the numbers of storms
- the sizes of clouds

Could you tell me which one is correct?

the amounts of daylight