Natural selection changes allele frequencies because some survive and reproduce better than others.
a. alleles
b. loci
c. species
d. individuals

The correct answer is option D. Individuals.

Explanation:

Natural selection is the process in which some individuals adapt traits or trends according to the environment changes in order to service and reproduce more. These trends are pass from one generation to another generation.

Natural selection is the first time described by Charles darwin.

Thus, the correct answer is option-

d. individuals

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