In a population of birds, the average beak size is favored. What type of selection is this? a. directional
b. disruptive
c. tabilizing
d. kin

C. Stabilizing selection

Explanation:

Natural selection, is of three different types namely: disruptive selection, directional selection and stabilizing selection. Disruptive selection occurs when the two extremes of a population are being favored over the average or intermediate.

Directional occurs when one extreme of a population is favored. However, in STABILIZING SELECTION, the average or intermediate population is favored over both extremes of a population. Example is when the average-sized beaks of a bird population is being favored over the long and short ones (extremes).

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.