How does adding the affix -etic to the words energy, athlete, and poet change the meanings of these words?
a. it changes them from nouns to adjectives.
b. it changes them from adjectives to nouns.
c. it changes them from nouns to adverbs.
d. it changes them from adverbs to nouns.

option A) It changes them from nouns to adjectives.

Explanation:

Each of these words: Energy, Athlete, and Poet belong to the class Noun. For a noun is a name of any person, animal, place, mood or thing.

The addition of affix "-etic" is as follows

Energy + "etic" = Energetic

Athlete + "etic" = Athletic

Poet + "etic" = Poetic;

These newly formed words are ADJECTIVES that helps describe a noun better.

e.g A sentence such as "PAUL is an energetic swimmer"

(tells more of the kind of swimmer Paul is)

in what passage i'm sorry but i don't see anything there.