What is a unique feature of a haiku?

a. The first and third lines have five syllables
b. Each stanza begins with the same word or phrase
c. It tells a story in each stanza
d. It has a repeating refrain

1 answer

The unique feature of a haiku is:

a. The first and third lines have five syllables.

A traditional haiku consists of three lines with a syllable pattern of 5-7-5.