Answer:
C) The two populations will evolve into separate species.
Step-by-step explanation:
In the given question, the population of animals has been split into two different populations due to a natural barrier present between them.
When we will observe these species after a very long time, the species will not be able to reproduce with each other and will be reproductively isolated. This reproductive isolation will lead to the formation of new species but belonging to the same genus.
Thus, Option-C is correct.