The hypothesis was that a species from the Pacific Rim may have o
the ancestor of 28 distinct species on the Hawaiian Islands. We
these supports this hypothesis and could be the result of observations
testing?

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

the answer is c on e2020, bud.

you know they are heterozygous for a trait because they have it as jj or jj.