A species of insect normally has wings that are pale in colour. This allows them to blend in with pale tree trunks. However, some insects in this species have wings that are darker. After several years, the tree trunks become darker because of environmental changes. In this species, insects with dark-coloured wings then become more common than those with pale-coloured wings. What process leads to this shift in the proportion of insects with dark-coloured wings?
- Abiotechnology
- Bconservation
- Cnatural selection
- Dselective breeding