Final answer:
The biggest difference between acting in life versus acting on stage is the presence of an audience. Acting in real life situations does not involve an audience, while acting on stage requires performing in front of a live audience.
Step-by-step explanation:
The biggest difference between acting in life versus acting on stage is the presence of an audience. When acting in real life situations, such as social interactions or everyday encounters, there is typically no audience observing and evaluating the performance. On the other hand, acting on stage involves performing in front of a live audience, which adds a new dynamic and requires actors to consider factors like visibility, audibility, and engagement with the audience.