What are 3 mechanisms for reproductive isolation which mechanisms isolates two populations of similar frogs with different mating calls

Behavioral isolation

Explanation:

The reproductive isolation refers to the mechanism which prevents the interbreeding between the organism. The mechanisms of reproductive isolation can be categorised into two types: The pre-zygotic and post-zygotic barriers.

The prezygotic isolation mechanisms are the behavioural, the habitat, mechanical and gametic isolation.

In the given question, the type of mechanism involved in the population of frog will be the "behavioural isolation" as the population of frog differ in their behaviour of mating ritual or mating calls which does not allow the frogs to mate.

Thus, Behavioral isolation is the correct answer.