Why Do Leaves Fall?

The reason why leaves fall is when leaves are not functioning. The leaves turn crusty and change their color and become weak. So when a wind comes to a tree most of the tree will fall. The tree actually like throw the leaves. When the days grow colder the tree sends a chemical message to the leaves telling the leaves time to go.

If you like to know more, listen to the audio file from NPR.org.

Caption image: Picture of a leaf cell
Source NPR .org