Which of the following types of reproductive barriers separates a pair of insect species that could interbreed but for the fact that one lives on goldenrod plants and the other on autumn daisies in the same general area?

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

i need an image of the diagram

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

answer; cnidarians;