Question

what does \fitness\ in the context of natural selection refer to?
ability to survive and reproduce
physical strength
genetic diversity

Explanation:

In natural selection, "fitness" is defined by an organism's ability to survive in its environment and pass on its genes through reproduction. Physical strength alone doesn't determine evolutionary success as it's about reproductive output. Genetic diversity is a population - level concept (though fit organisms contribute to it), while fitness is about an individual's reproductive success.

Answer:

Ability to survive and reproduce