Endangered species are species with decreasing populations that are sudden loss of habitat
decreased number of natural predators
increased availability of reproductive mates
moving an individual organism into captivity

Sudden loss of habitat

Explanation:

Endangered species are animal or plant species that are in danger of going extinct.

This usually results from them suddenly losing their habitat and thus being exposed to unfamiliar conditions or threats that could end their existence. For instance, elephants losing their forest habitats in India and thus encroaching on farmland only to get shot for damaging farms.

it has one origin of replication, but it proceeds in two directions - d)

i would say it is