Darwin's theory that the "fitter" survive and reproduce more offspring, who then inherit the traits that made their parents "fitter" is called:. a. mixed reproduction b. survival of the fittest c. heredity d. natural selection

Natural selection

Explanation:

it is a basic part of understanding evolution. Natural selection is the point at which animal types or populace changes after some time to further their potential benefit in their condition. In nature, there are four diverse determination types, each preferring explicit populaces by their phenotypes.There exists selection pressures on a population in a habitat. the population, on the other hand, have variations in genotype and phenotypes (traits) across individuals in the population. the selection pressures act upon these variations on a population to 'select' the superior traits that allow the population to best adapt to its habitat. these traits are passed down generations by reproduction.Hence, the right answer is "natural selection".

It is evolution, because we all have some of the same traits like eye color or shape or ears.