read the sonnet.

sonnet 130, by william shakespeare

my mistress’ eyes are nothing like the sun,
coral is far more red than her lips’ red;
if snow be white, why then her breasts are dun;
if hairs be wires, black wires grow on her head.
i have seen roses damasked, red and white,
but no such roses see i in her cheeks;
and in some perfumes is there more delight
than in the breath that from my mistress reeks.
i love to hear her speak. yet well i know
that music hath a far more pleasing sound.
i grant i never saw a goddess go;
my mistress, when she walks, treads on the ground.
and yet, by heaven, i think my love as rare
as any she belied with false compare.
what is the relationship between the couplet at the end and the three quatrains of sonnet 130?

each quatrain develops the main idea, which is restated in the final couplet.

the final couplet only reinforces the main idea in the first quatrain.

the three quatrains express different ideas, which are summarized by the couplet.

the couplet reverses the ideas stated in the first three quatrains.