Final answer:
A couplet is a pair of consecutive lines with end rhyme, represented by a rhyme scheme of AABB.
Step-by-step explanation:
A couplet is a pair of consecutive lines with end rhyme. It is represented by a rhyme scheme of AABB, where the first two lines rhyme with each other and the last two lines rhyme with each other. For example, the final two lines of Shakespeare's Sonnet 18 "So long as men can breathe or eyes can see, So long lives this, and this gives life to thee." are a couplet.