Answer: b. Alliteration.
Step-by-step explanation: alliteration is a literary device that consists in the repetition of the beginning sound of consecutive words or words that are close to each other. In the given lines from "greensleeves" we can see a clear example of alliteration in the repetition of the sound "gr" in the words "grassie" and "green" and then the "s" sound in the words "sleeves" and "satten." The other literary devices aren't present, because metaphors and similes are comparison and personification is giving human characteristics to nonhuman objects.