A species of insect usually has wings that are pale in colour. This enables them to be camouflaged on tree trunks that are pale in colour. A small number of insects in this species have wings that are darker in colour. After several years the tree trunks become darker in colour because of environmental changes. The insects with dark-coloured wings become more common than insects with pale-coloured wings in this species. Which process is responsible for this change in the proportion of insects with dark-coloured wings?
- Abiotechnology
- Bconservation
- Cnatural selection
- Dselective breeding