7. this image shows the various forces acting on a block of rock situated
on a rock slope. which arrow represents shear strength?

a. 4.
b.3
c. 1
d.2

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.