What area of the aircraft is primarily associated with customer boarding?

The jetbridge is primarily associated with customer boarding as it provides a direct connection from the terminal gate to the aircraft, allowing passengers to smoothly enter and exit the plane. This enclosed walkway facilitates the boarding process, ensuring that passengers can access the cabin without being exposed to outdoor elements, and it enhances the overall boarding experience by making it more efficient and comfortable.

In contrast, the galley is the area of the aircraft where food and beverages are prepared and stored, while the main cabin refers to the passenger seating area. The lavatory is designated for restroom facilities. While all these areas are essential to the operation of the aircraft and passenger experience, the jetbridge specifically serves the crucial function of enabling the boarding and deplaning processes.