Which poem begins with the line "How do I love thee?"

The line "How do I love thee?" is the opening of the poem written by Elizabeth Barrett Browning, titled "How Do I Love Thee?" This sonnet is part of her larger work "Sonnets from the Portuguese," which is a collection of love poems expressing deep affection and passion. The poem explores the various ways in which the speaker loves and cherishes the beloved, reflecting on the intensity and depth of those feelings.

The other choices do not start with this line, and their content varies significantly from the themes expressed in Browning's work. "We Real Cool," for instance, reflects on youth and defiance; "The Armadillo" discusses themes of nature and loss; while "The Unknown Citizen" critiques modern society and conformity. These thematic differences further confirm that the correct answer is indeed the poem that begins with the iconic opening line.