A species of insect normally has pale wings. These wings provide camouflage on pale tree trunks. A small number of the insects in this species have wings that are darker. After many years, the tree trunks turn darker because of environmental changes. In this species, insects with dark wings then become more common than those with pale wings. Which process is responsible for the change in the proportion of insects with dark wings?
- Abiotechnology
- Bconservation
- Cnatural selection
- Dselective breeding