Answer:
Answer is A. a behavioral reproductive isolating mechanism.
Explanation:
A behavioral isolation mechanism can be described or explained as a mechanism whereby , mating rituals or signals of species of an organism are different from one another , in order to prevent interbreeding or interest in courtship among them.
In this case , the organisms in the population may be similar, and have the tendency of interbreeding, but , because of their different mating or courtship signals, the interbreeding won't be possible.
This difference in song likely serve if the populations came in contact due to function - A) a behavioral reproductive isolating mechanism
Species are reproductively isolated by various mechanisms, one of which is due to the behavior. Singing is a mating call if the song is different mating will not happen and it is termed as a behavioral isolating mechanism for reproduction.
Temporal isolation is with respect to the time when different species mate during a different time. Postzygotic, zygotes become infertile after fusion. Gamete isolation two different gametes don't fuse and hence no formation of zygote.
Learn more about the temporal reproductive isolating mechanism:
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