GENERAL KNOWLEDGE

Detailed explanation-1: -Geographical isolation happens when a group of plants, animals or other living individuals are separated from mixing genes within the indiciduals in the same species. Geographical isolation may ultimately lead to the populations becoming separate species by adaptive radiation.

Detailed explanation-2: -The central idea here is that when populations are geographically separated, they will diverge from one another, both in the way they look and genetically. These changes might occur by natural selection or by random chance (i.e., genetic drift), and in both cases result in reproductive isolation.

Detailed explanation-3: -Reproductive isolation allows organisms to evolve to be different enough that they become distinct species that can no longer interbreed if their populations become contiguous again.