Which statement BEST describes the theory of natural selection?
Select one:
It increases the size of a population
It requires the individuals to be identical
It guarantees the survival of a species
It happens over a long period of time

It guarantees the survival of a species

Explanation:

organisms become better adapted to their environment and tend to survive and produce more offspring

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.