Peppered moths have learned to stay still (not move) on a tree trunk during daylight hours to avoid being eaten by birds. This is an example of... A. Natural selection
B. Behavior adaptation
C. Structural adaptation
D. Selective breedeinh

Behavior adaptation

Explanation:

Behavior adaptation is where a animal behaves in a different manner that suits its environment or keeps the animal safe

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.