The correct answer is: C. ex-situ conservation.
Ex-situ conservation is the conservation of an endangered species outside of its natural habitat. This can be done in zoos, wildlife parks, botanical gardens, or other facilities. Ex-situ conservation can be used to protect species that are threatened or endangered in the wild, to breed them in captivity, and to reintroduce them to the wild.
In-situ conservation is the conservation of an endangered species in its natural habitat. This can be done by protecting the species’ habitat, by managing the species’ population, and by controlling the threats to the species. In-situ conservation is the most effective way to protect a species, but it can be difficult and expensive to do.
In-vivo conservation is the conservation of an endangered species in its living form. This can be done in zoos, wildlife parks, botanical gardens, or other facilities. In-vivo conservation can be used to protect species that are threatened or endangered in the wild, to breed them in captivity, and to reintroduce them to the wild.
Exvivo conservation is the conservation of an endangered species in its non-living form. This can be done by preserving the species’ DNA, by cloning the species, or by creating a synthetic version of the species. Exvivo conservation is a relatively new field, and it is not yet clear how effective it will be.