<span>The poetic form of “your laughter” is known as free verse, because it doesn't follow any rules regarding rhyme schemes or the overall structure of the poem.
Blank verse is written in pentameter, so that answer, as well as pentameter are incorrect. It isn't a sonnet either, because sonnets have only 14 lines.
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<em>a. a poem written in unrhymed iambic pentameter</em>
B - it obviously wouldnt be c or d, and the middle class came into existence long enough ago that its unlikely to be a modern article