Based on a case study, do you think gray wolves should have been delisted from the federal endangered species list, and thus be partially protected rather than completely protected? should they remain off the list?

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.