Which of the following is an advantage of aircraft pressurization?

An advantage of aircraft pressurization is that it reduces the need for supplemental oxygen. When an aircraft climbs to high altitudes, the atmospheric pressure decreases significantly, which can lead to insufficient oxygen levels for passengers and crew. By pressurizing the cabin, the aircraft maintains a higher atmospheric pressure equivalent to lower altitudes, allowing the occupants to breathe comfortably and reducing the risk of hypoxia, a condition resulting from inadequate oxygen levels. This capability enhances safety and comfort during flight, especially on long-haul journeys.

The other aspects mentioned do not directly pertain to the primary benefits of pressurization. While increased cabin pressure is a result of pressurization, it does not represent an advantage in itself, as it is simply a feature enabled by pressurization systems. Enhanced engine performance and greater fuel efficiency are not directly tied to cabin pressurization but rather relate to other design factors and operational strategies within aircraft systems.