Question

in poetry, the term speaker refers to the
main character.
narrator.
poet.
reader.

Explanation:

In poetry, the "speaker" is the voice that conveys the poem's message, which is typically the poet (though sometimes it can be a created persona, but among the options, "poet" is the best fit as the speaker is the one (often the poet) expressing in the poem. "Main character" is more for narrative fiction, "narrator" is broader (and in poetry, "speaker" is more precise than narrator), and "reader" is the audience, not the speaker.

Answer:

C. poet