Question

it is interesting to note that in places with four seasons, leaves change color as the days become shorter in autumn. with less sunlight available, the chlorophyll stops performing photosynthesis. the leaves begin to lose their green color. yellow and orange carotenoids (the same chemicals that make carrots orange) that are already in the leaves begin to show through. some trees may also begin to produce a red substance called anthocyanin (which gives the red color to strawberries and cranberries) as temperatures drop, adding to the variety of fall colors. 71. why do leaves change color in the fall?

Explanation:

In autumn, days get shorter, so less sunlight is available. Chlorophyll stops photosynthesis, and leaves lose their green color. Yellow/orange carotenoids (already in leaves) show through. Some trees produce red anthocyanin as temperatures drop, adding to fall colors.

Answer:

In fall, days become shorter (less sunlight). Chlorophyll stops photosynthesis, leaves lose green. Yellow/orange carotenoids (in leaves) show, and some trees make red anthocyanin as temp drops, causing leaf color change.