A 14-line poem:

**The reasoning** A **sonnet** is defined by its strict 14-line structure. This is the key characteristic that sets it apart from other poetic forms. Whether it's a Shakespearean sonnet (three quatrains + a couplet) or a Petrarchan sonnet (an octave + a sestet), the line count is always 14. Think of famous love poems or Shakespeare's works — they follow this exact pattern. **Why the wrong options tempt you** - **Ballad**: This narrative poem tells a story and typically has 4-line stanzas, but no fixed total length — it can go on for many verses. - **Ode**: A lyrical poem expressing deep feelings about a subject. It's usually much longer than 14 lines and doesn't have a strict line limit. - **Haiku**: This Japanese form is extremely short — only 3 lines with a 5-7-5 syllable pattern. The opposite of 14 lines! **Quick takeaway** When you see "14 lines," immediately think **sonnet** — it's the only major poetic form with that exact requirement, like a fingerprint for identifying poems.