Answer the following question given this paragraph: 

Sympatric speciation occurs when groups from the same species stop mating because of something other than physical or geographic separation. The behavior of two groups that live in the same region is an example of such separation. The separation may be caused by different mating seasons, for example. Sympatric speciation is more difficult to identify.


Q: What occurs when groups from the same species stop mating because of something other than physical or geographic separation?

 Choices:

- extinction

- complementary speciation

- invasive speciation

- sympatric speciation

A:
sympatric speciation
