What is one purpose of wearing seat belts in an aircraft?

Wearing seat belts in an aircraft is primarily for protection in the event of a crash. In situations where an aircraft experiences turbulence, a sudden maneuver, or an emergency landing, a seat belt helps to secure a passenger firmly in their seat. This can prevent injury from being thrown around the cabin or from colliding with interior structures or other passengers. The primary function of a seat belt is to provide safety by reducing the risk of physical harm during unexpected flight incidents.

While looking professional, keeping the aircraft clean, and restricting movement may all have some relevance in various contexts, they do not reflect the essential safety function of seat belts. Proper safety protocol mandates the use of seat belts to enhance passenger safety and minimize injuries. Therefore, the emphasis on protection in a crash solidifies seat belts as a critical safety feature in aviation.