Distinguish between ""sensation"" and ""perception"". identify some of the major structures in the brain that are responsible for these processes.

Explanation:

The sensation is a process which occurred when sensory receptors respond to a particular stimulus. The perception is closely associated with the sensation. In perception, the brain choose, arrange and interprets the sensations. The perception of the same stimulus varies from person to person because every person's brain interprets stimuli differently. Interpretation of perception depends on individual’s intellectual aspects such as memory, learning, expectations.

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.