What is a characteristic feature of a Couplet?

A couplet is characterized by its structure of two rhymed lines that typically share the same meter. This feature makes couplets a distinct and recognizable form of poetry. The rhyme scheme in a couplet creates a rhythmic and pleasing sound, often used to convey complete thoughts or ideas in a concise manner. This two-line format is commonly found in various poetic traditions and can be used to elaborate on themes, introduce a surprising element, or make a poignant statement.

The other options refer to structures or patterns that do not apply to couplets. For instance, 14 lines refer to a sonnet, a single line does not define a couplet, and while a couplet can appear at the end of a poem, it is not a requirement for its definition.