He hears Juliet deliver her famous "Romeo, o Romeo, where for art thou Romeo" speech.
Romeo climbed over the wall surrounding the Capulet garden to gain entry and see Juliet.
No
no
no
Romeo asks Juliet's Nurse, "who is that / that doth enrich the hand of yonder knight?"
The only person who knows he is in the Capulet garden apart from himself is Juliet.
The party-goer who was most outraged by Romeo's presence at the Capulet's party in "Romeo and Juliet" was Tybalt, a cousin of Juliet. Tybalt was quick to recognize Romeo and vowed to seek revenge for his intrusion.
he's in the garden
Juliet's garden to listen to her.
Benvolio
His pals Mercutio, Benvolio et al try to follow him but don't get as far as Juliet's garden. Only Romeo gets in there.
It is telling you what is going to happen in the story.