Biology

The correct answer is: A.Allopatric speciation

Explanation:

The various species of pupfish in isolated springs and pools in Death Valley evolved from a common ancestor due to the region drying up, which caused the populations to become geographically isolated. These isolated populations were cut off from one another, leading to reproductive isolation and independent evolution in each population, ultimately resulting in different species. This is an example of allopatric speciation, ...