Which form of poetry consists of three unrhymed lines with syllable counts of five, seven, and five?

The form of poetry that consists of three unrhymed lines with syllable counts of five, seven, and five is known as a haiku. This traditional Japanese form captures moments in nature or emotional experiences through concise imagery and simplicity. The structure of a haiku emphasizes brevity, allowing poets to convey deep meanings and evoke feelings in just a few words. The first line has five syllables, the second has seven, and the third returns to five syllables, creating a rhythm that lends itself to the form's reflective nature.

Acrostic poetry, on the other hand, uses the first letters of each line to spell out a word or message, while villanelles are structured with a specific rhyming scheme and are typically longer, consisting of 19 lines. Blank verse is written in unrhymed iambic pentameter, which is quite different from the clearly defined syllable count of a haiku.