Final answer:
Romeo uses 'crows' to contrast the beauty and grace of Juliet, viewed as a 'snowy dove,' against the ordinary or plain appearance of the others around her at the Capulet party, in Shakespeare's 'Romeo and Juliet.'
Step-by-step explanation:
In the excerpt from William Shakespeare's Romeo and Juliet that reads, so shows a snowy dove trooping with crows as yonder lady o’er her fellows shows, Romeo uses the word crows to imply that compared to the lady he admires, the others around her are unremarkable and plain. Here, the snowy dove is a metaphor for purity, beauty, and radiance, standing out in stark contrast to the darker, less desirable appearance of the crows. This juxtaposition highlights the lady's (Juliet's) exceptional beauty and grace amongst the common crowd at the Capulet's party.
The use of crows symbolizes the ordinary or even unattractive features of the other people present, as crows are often associated with darkness and are less romantically idealized than doves. This literary device is known as a comparison that utilizes contrasts to enhance the description of the subject of admiration, which, in this context, is Juliet.