Question

Why do leaves change color in the fall?

Answer 1

During the fall the day gets shorter hence less sunlight this results to leaves stopping their food making process. The chlorophyll breaks down, the green color disappears and the yellow to orange color becomes visible

Step-by-step explanation:

Answer 2

The chlorophyll breaks down because fall and winter seasons are short so the sunlight is limited and that's what is needed to make the tree's food.