What are all of the secondary consumers included in this web?Herring Sprat

Gray seal

Saduria entomon

Monoporeia affinis

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.

if you know your abc's you should be able to get your answer or just use google