Final answer:
The purpose of the prologue in Romeo and Juliet is to set up the central conflict between the families.
Step-by-step explanation:
The purpose of the prologue in Romeo and Juliet is Option 3: To set up the central conflict between the families. The prologue provides a brief overview of the story, introducing the audience to the ongoing feud between the Montagues and Capulets, which sets the stage for the conflicts that arise throughout the play. It establishes the central conflict that Romeo and Juliet must overcome in order to be together.