Earth's rocks change from one type into another, as described in the rock cycle. One type of rock is known as metamorphic rock. Metamorphic rocks are formed under which of the following
conditions?

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.