Poetry is written in lines. Unlike paragraphs or chapters, which are used in prose, poetry is composed of lines. These lines are typically shorter than the sentences found in prose, and they often contain rhythm, rhyme, and other poetic devices that are used to create a unique and artistic expression. The use of line breaks in poetry can also convey meaning and emotion, and can be used to create emphasis, pause, or other effects that contribute to the overall effect of the poem.