The couplet is a structural element of the poem contains the following two lines. The couplet is the pair of successive two-line of the meter in the poem.
The couplet is two lines of poetry usually rhyme that are self-contained in grammatical structure and meaning. An example of a couplet is a good night.
The reason for the couplet is to indicate the cease of the poem and depart a poem on a succinct notice that leaves an enduring impression.
Therefore Couplet is used for the impression in the poem.
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