This type of mutation occurs when one or more base pairs are removed from the gene sequence. A deletion B insertion C substitution

A. Deletion

Explanation:

It is deleting base pairs from the gene sequence

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.