Respuesta :
The correct answer is when one population cannot interbreed with the other population as there will be speciation.
Speciation is an evolutionary method via way of means by which a brand new species come into being. A species is a set of organisms that can reproduce with each other to supply fertile offspring and is reproductively remoted from different organisms.
What are the four steps of speciation?
- the formation of the latest species;
- the splitting of a phylogenetic lineage;
- acquisition of reproductive separating mechanisms producing discontinuities among populations;
- method via way of means of which a species splits into 2 or species.
Thus it is clear that when one population cannot interbreed with the other population then one species of organisms becomes two species.
To know more about phylogenetic species refer to the link :
https://brainly.com/question/385240