Final answer:
Benvolio draws his sword in Act 1, scene 1 of Romeo and Juliet to protect himself from Tybalt's aggression and to maintain peace by separating the fighting factions.
Step-by-step explanation:
Benvolio draws his sword in the street in Act 1, scene 1 of Romeo and Juliet to protect himself from Tybalt's aggression. When the Montagues and Capulets engage in a street brawl, Benvolio tries to break up the fight and keep the peace. He draws his sword to defend himself and create a barrier between the fighting factions.