Final answer:
The chorus in Shakespeare's 'Romeo and Juliet' reveals the fates of the main characters. It sets the stage for the tragedy by informing the audience of the protagonists' eventual demise.
Step-by-step explanation:
In the prologue of Shakespeare's Romeo and Juliet, the chorus performs a specific function to set the stage for the play's action and themes. The correct answer to what is revealed about the chorus in the excerpt from the prologue is b) The chorus reveals the fates of the main characters. While the chorus can be a single character, in this context, it informs the audience about the upcoming events, specifically the destinies of Romeo and Juliet. The chorus is not primarily concerned with the setting or speaking in a humorous tone. It serves a critical purpose by preparing the audience for the tragic love story, hinting at the inevitable conclusion, and framing the overarching theme of the play, which is the destructive nature of hate.