Final answer:
The repetition of the line in the poem serves to tie it together, give it forcefulness, and reinforce the theme of living between two worlds.
Step-by-step explanation:
The repetition of the line, "To live in the Borderlands means," in Anzaldúa's poem, "To Live in the Borderlands," serves multiple effects. It ties together the descriptions of life in the borderlands from each of the stanzas, creating a complete picture.
It also gives the poem forcefulness and strength through repeated sounds and words, enhancing its impact. Additionally, the repetition reinforces the theme that the experience of living between two worlds is difficult to understand and describe.