What do goblet cells and cilia have in common? both moisten the air. both filter the air. both secrete mucus. both diffuse oxygen.

Both of them secrete mucus. The protective function of cilia in the trachea is moving the sheet of mucus that are contaminated, away from the lungs, toward the throat for swallowing.Goblet cells secrete the mucus's major components which is called the gel-forming mucins.

C. The dark colored moths will experience disruptive selection.

Explanation:

When A bird species is introduced in the habitat with white and black moth, the moths in black or dark color will experience disruptive selection as The tree or habitat is favoring white moth and black moth will be easily noticed by predators or birds.

Disruptive selection is a type of natural selection in which genetics of population is changes by favoring traits with extreme over intermediate values.

Due to increase in pressure of predators the dark moth will try to find the  advantages from light shoot trees (as shown in figure) for survival and leads to speciation with two or more different species forming, and the moth with middle traits will be wiped out.

Hence, the correct option is C.