(This is a 6th grade science question)
I need help. I habe tried to figure this out on my own but I can't find the answers. Do you know any place I can find information for this?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

In each transformation of energy , some energy what?

This rapid change in species that rarely leaves behind fossil evidence is referred to as