There are many different reason's that leaves change color. Here are a couple reasons why.
One way is the type of tree. Because of the certain type of tree the characteristic of the specific specie, it is a way to identify what tree and what type it is. This is just one reason why.
Another reason is the chemical that is in the tree it's self. A couple of chemicals are chlorophyll, carotene xanthophyl and many more. Here are some of the chemicals and the colors they create,
chlorophyll (green), carotenoid (yellow, orange, and brown), anthocyanin (red).
One way is the type of tree. Because of the certain type of tree the characteristic of the specific specie, it is a way to identify what tree and what type it is. This is just one reason why.
Another reason is the chemical that is in the tree it's self. A couple of chemicals are chlorophyll, carotene xanthophyl and many more. Here are some of the chemicals and the colors they create,
chlorophyll (green), carotenoid (yellow, orange, and brown), anthocyanin (red).