6. In an energy pyramid, which level has the most available energy?

A. producer level
B. first-level consumer
C. second-level consumer
D. third-level consumer

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.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added