"How does of DNA determine what you look like and how your body work?"

because genes make up the infrastructure of your body, but at the same time so does your DNA. With a mix of your parents genes and your own personal DNA, a custom made human is made.

Explanation:

penus

answer; i believe the answer is hydraulic action;

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.