Using the drop-down menus below, identify the processes cells use to maintain homeostasis

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.

I’m stuck on this question cuz i’m stupid sksksksk

What is the period of cell life when it is conducting