Which region is directly near the edges of a continent? a submarine canyon

a continental margin

a mid-ocean ridge

an atoll

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.

wegner's theory did not explain how the continents could move

explanation:

other information encoded in your genes might distinguish you from the others in the group