What provides engine protection against damage due to limits on various engine parameters?

The correct choice identifies the Full Authority Digital Engine Control (FADEC) as the system responsible for providing comprehensive engine protection by managing various engine parameters. FADEC integrates multiple functions, including monitoring and controlling the engine's performance within specified limits. It continuously analyzes sensor data and adjusts fuel flow, ignition timing, and other operational factors to ensure the engine operates safely and efficiently.

By maintaining control over critical limits such as temperature, pressure, and speed, FADEC helps prevent conditions that could lead to engine damage. This proactive approach to engine management not only enhances performance but also increases safety by ensuring that the engine operates within its designed operating envelope.

Other systems, while they may contribute to engine performance or management, do not encapsulate the full range of protective and control functions that FADEC provides. The Engine Management System may offer some oversight, but it typically is not as comprehensive. The Fuel Control Module focuses mainly on fuel delivery rather than overall engine protection. The Engine Monitoring Unit is involved in tracking engine parameters and providing data feedback but lacks the active control and management capabilities that FADEC has.