Question

the leaves of trees turn yellow and orange in fall season​

Answer 1

Answer:

Chlorophyll Breaks Down

But in the fall, because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.

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Answer 2

Answer:

because when they are detached from the tree , they lose their moisture