When an animal is injected with an antigen, the animal will respond by producing:
a. polyclonal antibodies
b. monoclonal antibodies
c. both of the above
d. agglutinates
e. none of the above

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.