Fossil evidence suggests that a number of members of one fish species from an ancient lake in Death Valley, California, became several isolated species. Each of these new species lived in a different pond. Which of the following best explains the cause of this speciation?
geographic isolation

Geographic isolation

Explanation:

Geographic isolation -

It is considered to be the method by which the group of some specific living organisms gets isolated from rest of the organisms , which disables the species from sharing any genetic information , is referred to as geographic isolation .

The process of geographic isolation can be due to any accident or any coincidence .

Hence , from the given scenario of the question ,

The correct term  is geographic isolation .