Plants forming new buds Sun shining on flowers Grass being wet in the morning Leaves changing color on trees
I gave my students this multiple choice question: Which of these is the BEST sign that the fall season has begun?

Only one answer is correct among these 4 choices:
- Plants forming new buds
- Sun shining on flowers
- Grass being wet in the morning
- Leaves changing color on trees

Could you tell me which one is correct?

Leaves changing color on trees