Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called
- Keystone species
- Allopatric species
- Sympatric species
- Threatened species
Explanation
Option (a) is correct
- Keystone species determine the survival of many other species in an ecosystem. The addition or loss of a keystone species from an ecosystem leads to significant changes in the occurrence of at least one other species. If a keystone species is lost, it will result in the degradation of the whole ecosystem
