Final answer:
The line from Shakespeare's 'Romeo and Juliet' that indicates Romeo's physical attraction to Juliet is 'O, she doth teach the torches to burn bright!' signifying her striking beauty.
Step-by-step explanation:
The line that supports the claim that Romeo is physically attracted to Juliet is "O, she doth teach the torches to burn bright!" This line from Shakespeare's Romeo and Juliet suggests that Juliet's beauty is so striking that it outshines the torches, metaphorically teaching them to burn more brightly. This vivid imagery used by Romeo emphasizes his intense physical attraction towards Juliet's appearance.