In a certain species of mammals, gray fur (G) is dominant to white fur (8) and brown eyes (B) are dominant to blue eyes (b). An animal with white fur and blue eyes is crossed with an animal that has
gray fur and brown eyes (GGBb). What trait will appear in all of the offspring of this mating?

Gray fur (G) trait will appear in all of the offspring of this mating.

This is because one parent has GG. Even if the other parent has gg, all the offspring will have Gg and G is dominant.

Dominant and recessive traits exist when a trait has two different forms at the gene level.

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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.

satellites are frequently used to make observations of the orbit on earth