PLEASE HELP ASAP

The process by which natural forces move weathered rock and soil brim one place to another is called

What is the name for a substance formed in a chemical reaction

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.