Answer:
Option B, Mechanical Isolation
Explanation:
Mechanical isolation is a phenomena which prevent species from mating each other.
In mechanical isolation, species have different physical structure due to which they are unable to interbreed.
For example - In snails, two certain species are unable to mate as the shell of one is coiled in the same direction as that of shell of other. Hence, two right coiled snails cannot breed with each other. The same applies to the left side tailed species.
Hence, option B is correct
