Reproductive isolation:
a) Means there is no gene flow between two groups of organisms.
b) Is necessary for species to remain separate.
c) Is maintained by certain prezygotic and postzygotic barriers.
d) All of the choices are correct.
e) None of the choices are correct.

The answer is b

Explanation:

This is because the species need to remain separated from each-other for this to work

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high