What is the main reason water from the oceans turns to water vapor, and then evaporates into the air?
a) ocean breezes
b) changing tides
c) heat from the sun
d) moon's gravitational pull

b.

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.