Final answer:
Among the given options, dialogue is a feature that a poem is least likely to have, as poetry often emphasizes imagery, themes, emotional depth, and rhythm rather than direct conversation.
Step-by-step explanation:
A feature that a poem is least likely to have among the options provided is c) Dialogue. While poems can contain elements of dialogue, they most commonly focus on imagery, themes, and emotional depth. Elements like conflict and theme are central to most literary works, including poetry, as they contribute to the meaning and depth of the piece. Even in modernist or free verse poetry, which may move away from traditional structures, the rhythm can be present through the careful selection of words and phrases, though it may not follow a regular pattern as classical poetry does. Rhythm is integral to the flow and musicality of the poem and often works hand in hand with rhyme, though the latter is not a necessity for all poems.