Which of the following terms refers to the success at leaving descendants of an individual or group of individuals?

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Fitness refers to the ability of an individual or group of individuals to pass on their genes to future generations, which is measured by their success at leaving descendants. Differential reproductive success refers to the variation in the number of offspring produced by individuals in a population, which is a component of fitness. Fixation refers to the process by which a particular allele becomes the only allele at a given locus in a population, while reproduction refers simply to the production of offspring.

Which of the Following Terms Refers to the Success at Leaving