Given the recent evidence suggesting that species change due to certain genetic mistakes, which of these is true? darwin's theory of evolution was wrong. natural selection cannot cause evolution. mutation and natural selection both cause changes in a population. changes in a population occur abruptly as a response to the environment.

C. Mutation and natural selection both cause changes in a population.

hope this helps you

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.