Which of the following is not true about natural selection? Which of these points of natural selection is incorrect?

A.) Variation among individuals in a species
B.) Individual species will compete for resources (food etc.)
C.) Competition within species leads to some organisms being more fit
D.) The characteristics of populations within species will change over time
E.) Individuals in a population with unfavorable adaptations will most likely survive and reproduce.

C.) Competition within species leads to some organisms being more fit

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.