Answer: D) The alliteration is used to emphasize the simile about the subject's beauty.
Explanation: alliteration is a literary device that consists in the repetition of the beginning sounds of consecutive words, or words that are close to each other. In the given lines from "She Walks in Beauty" by Lord Byron, we can see an example of alliteration in the phrases "cloudless climes" and "starry skies" this phrases are referring to the night, that is being compared with the woman's beauty ("she walks in beauty, like the night"), so we can see that the alliteration is used to emphasize the simile about the subject's beauty.
