Final answer:
The line length in haiku affects the rhythm of the poems by emphasizing the consistent number of syllables in each line.
Step-by-step explanation:
The line length in haiku affects the rhythm of the poems by emphasizing the consistent number of syllables in each line. Haiku poems consist of three lines with a syllable count of 5-7-5. This strict syllable count creates a rhythmic pattern in the poems and contributes to their unique form.