What is one purpose of a jet pump in a pressurization and air-conditioning system?

The role of a jet pump in a pressurization and air-conditioning system is primarily to aid in the augmentation of airflow in specific areas of the aircraft. Jet pumps leverage the principle of entrainment, where high-velocity air flows through a nozzle, creating a low-pressure zone that draws in additional air from surrounding regions. This mechanism enhances airflow, ensuring that conditioned air is distributed more evenly and effectively within the cabin.

While the other options present aspects that relate to cabin environment management, they do not directly correlate with the function of a jet pump. For example, increasing cabin humidity is not a function of a jet pump, as that would require a method for introducing water vapor, which is unrelated to airflow enhancement. Controlling cabin altitude pertains more to the pressurization system itself rather than the specific role of airflow augmentation. Lastly, filtering particulate matter involves air purification systems, which are distinct from the operational purpose of a jet pump.