What is the main characteristic of a Tanka poem?

A Tanka poem is defined primarily by its structure, which typically consists of five lines with a specific syllable pattern: the first line has five syllables, the second has seven, the third has five, the fourth has seven, and the fifth has seven syllables. This creates a total of 31 syllables. The form is a traditional Japanese poetic style that emphasizes evocative imagery and emotional depth, often reflecting nature or personal experiences.

The option indicating that it consists of five unrhymed lines accurately captures the essence and structure of a Tanka, which sets it apart from other types of poetry that may involve more lines, a defined rhyme scheme, or specific narrative elements. By emphasizing an unrhymed structure, Tanka allows for a more free-flowing expression, centering on the beauty of the language and the feelings expressed rather than adhering to a strict metrical pattern. This focus on imagery and emotion through a concise format is what makes Tanka a unique and powerful form of poetry.