Which factors involving the activities of people are a threat to biodiversity?

Variety of living organisms; includes genetic, species, and ecological types.

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.

Paint and solvents pose no potential hazard to human health. select the best answer from the choices provided t f