What refers to the configuration of an aircraft?

The configuration of an aircraft primarily refers to the seating arrangement onboard. This includes how seats are arranged in the cabin, the number of seats, the layout of premium versus economy seating, and other features such as the presence of galleys and lavatories. Understanding the configuration is crucial for flight attendants, as it impacts passenger safety, service delivery, and emergency procedures.

The overall weight of the aircraft relates more to its performance and safety parameters during flight rather than its physical layout. Altitude level settings pertain to the operational aspects of flying rather than how the interior of the aircraft is set up for passenger comfort or service. The specific model and brand of the aircraft identifies the type of aircraft but does not provide insights into its internal layout, which is what configuration specifically addresses. Therefore, the seating arrangement is the most accurate representation of what the term 'configuration' refers to in the context of an aircraft.