Answer: 1. so shows a snowy dove trooping with crows.
Explanation: Alliteration is a literary device that consists in the repetition of the first syllable of consecutive words, or words that are close to each other. Alliteration is often used to create rhythm, symmetry or to make the text more effective. In the given excerpt from act I from "Romeo and Juliet" by William Shakespeare, we can see an example of alliteration in the phrase "so shows a snowy dove trooping with crows."