Which system is involved in air flow from engine to cabin in a pressurized aircraft?

The most pertinent system involved in the airflow from the engine to the cabin in a pressurized aircraft is the Environmental Control System. This system is responsible for regulating the temperature, pressure, and quality of air in the cabin, ensuring a comfortable and safe environment for passengers and crew.

The Environmental Control System draws outside air, compresses and heats it before distributing it throughout the cabin. It also manages the airflow from the engines to maintain cabin pressure at high altitudes, which is critical for passenger comfort and aircraft performance.

While the Sonic Venturi/Flow Limiter has a role in regulating airflow, it is not primarily responsible for creating the entire airflow system from the engine to the cabin. The other options, such as the Recirculation System and Fuel Management System, pertain to different functions entirely. The Recirculation System reuses cabin air to maintain efficiency, and the Fuel Management System is focused on the aircraft's fuel flow and management—neither of which directly relates to airflow regulation in the cabin.