In the context of poetry, what role do couplets serve?

Couplets, defined as pairs of lines in poetry that typically rhyme, often serve to encapsulate ideas or emotions in a concise way. In the context of poetry, they can effectively resolve questions or dilemmas presented earlier in the poem. When a poet employs couplets, the second line can serve as a conclusion or an answer to a query posed in the first line, thereby creating a clear and memorable resolution. This resolution can contribute to the overall meaning and impact of the poem, guiding readers to a more profound understanding or emotional response.

The other options present roles that couplets might not primarily fulfill. While couplets do rhyme, that is more a structural characteristic than a purpose. They can also contribute to the mood of the poem, but their main role is not necessarily to elevate the mood. Regarding providing a narrative framework, couplets may not always create a narrative; instead, they often focus on thematic or emotional expression rather than storytelling. Thus, the strength of couplets lies in their ability to succinctly convey resolution, aligning with the correct answer.