The rhythm of a poem refers to the pattern of stressed and unstressed syllables in each line. It is created by the arrangement of words and phrases, as well as the length and structure of the lines. Rhythm can vary throughout a poem, and can affect the overall tone and mood of the piece. It can be regular and predictable, or irregular and unpredictable, depending on the poet's intention. Rhythm can also be used to create a sense of musicality and flow in a poem.
