Ostriches are a large flightless african bird with solid bones and very powerful hindlegs for running and kicking. rheas are from south america. other than the fact that they are about half the size of an ostrich, their physical features are almost identical to ostriches. which conclusion is not supported by the observations concerning ostriches and rheas?

D

Explanation:

Ostriches and rheas started off as different species, but have evolved over time to become identical to each other.

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.