These two squirrels live in the same ecosystem. What type of interaction do the images represent? A. direct competition
B. mutualism
C. interference competition
D. symbiotic
E. indirect competition

( both squirrels are eating nuts )

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

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.