What is the purpose of air bags in a vehicle?

The primary purpose of air bags in a vehicle is to provide cushioning and protection for occupants during a collision. They are designed to inflate rapidly upon impact, creating a protective barrier that helps keep the head, neck, and chest from colliding with hard surfaces within the vehicle, such as the dashboard or steering wheel. This cushioning effect significantly reduces the risk of severe injuries, making air bags a critical safety feature in modern vehicles.

The other options focus on unrelated functions that do not align with the role of air bags. For instance, air bags do not reduce engine damage, improve fuel efficiency, or assist with parking; instead, their sole purpose is to enhance passenger safety in the event of an accident.