According to natural selection, why do more individuals with a useful variation survive and reproduce?

Answer and explanation

Correct answer: C. They are better adapted and pass on their alleles

Better-adapted individuals are more likely to survive and reproduce, so their alleles become more common.
Answer: They are better adapted and pass on their alleles.
Why not the others: They choose to change their genes: organisms cannot choose mutations. Their offspring always inherit acquired characters: acquired traits are not inherited. They live longer: survival depends on adaptation, not only diet.

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