Answer:
The correct answer is: fitness relates to natural selection in how the organisms that get to survive and reproduce are the ones that are the fitter.
Explanation:
Fitness, in biology, is used to measure the reproductive success of an organism or a species.
An organism that is fitter, due to its fitness-increasing alleles given by microevolution (this is the change in allele frequencies), has more chances of reproducing and pass its alleles on to its offspring - this way, the more competent traits are the ones that keep on existing in the environment of said organism.
