Which item is considered an example of a prop?

In the context of film and theater, props are defined as objects used on stage or in a scene to enhance storytelling and support the narrative. They are items that actors interact with during a performance, providing a tangible element that can help convey the story or character motivations.

Car keys perfectly fit this definition of a prop. They are small, portable objects that an actor might use in a scene to demonstrate a character's actions, intentions, or circumstances—such as unlocking a car or signaling that it's time to leave. This interaction helps not only to progress the plot but also enriches the character's portrayal.

The other items listed do not align as well with the definition of props. A chair, while it may be interacted with in a scene, is typically considered more of a set piece or furniture than a prop because it serves a primary structural purpose. A backdrop is part of the set design, providing a visual context for the scene rather than being something characters interact with directly. Lighting equipment is primarily technical and is vital for the overall production but does not directly contribute to the narrative in the same way that props do. Understanding these distinctions can enhance your appreciation of how various elements contribute to storytelling in cinema and theater.