Red blood cells have and generate energy
a. mitochondria; anaerobically
b. no mitochondria; anaerobically
c. mitochondria; aerobically
d. no mitochondria; aerobically
e. none of the above

because the light is a great source of energy for the plants to survive. (i hope this )

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.