(5)extinction is least likely in which of the following scenarios?
a) a population of rabbits exhibiting little genetic variation.
b) a large field filled with the same species of wheat.
c) a pond ecosystem with a lot of biodiversity.
d) an ecosystem that exists in an unstable environment.

D.

Extinction is caused by unfavourable conditions that will exist in an unstable environment.

The Laotian rock rat or kha-nyosometimes called the "rat-squirrel", is a rodent species of the Khammouan region of Laos. The species was first described in a 2005 article by Paulina Jenkins and coauthors, who considered the animal to be so distinct from all living rodents, they placed it in a new family, Laonastidae. In 2006, the classification of the Laotian rock rat was disputed by Mary Dawson and coauthors. Dawson and her colleagues suggested instead it belongs to the ancient fossil family Diatomyidae, that was thought to have been extinct for 11 million years, since the late Miocene. It would thereby represent a Lazarus species. The animals resemble large, dark rats with hairy, thick tails like those of a squirrel. Their skulls are very distinctive and have features that separate them from all other living mammals.