Answer:
Upstaging refers to a phenomenon in which an actor intentionally or unintentionally diverts the audience's attention from another performer on stage. This can be achieved by utilizing a range of techniques, such as projecting their voice, employing more dynamic body movements, or utilizing exaggerated gestures. Furthermore, the position of the performer can also contribute to upstaging, as blocking another actor from the audience's perspective may result in a loss of focus on the intended focal point of the scene. Consequently, it is imperative for actors to be cognizant of their positioning and movements on stage, in conjunction with adhering to the stage directions indicated in the script. To ensure the spotlight remains on the narrative, actors must collaborate effectively and avoid unintentionally upstaging each other.