Which system is used to monitor the pressure and temperature in a marine engine?

The choice of engine monitoring systems is the correct answer as these systems are specifically designed to track various critical parameters within a marine engine, including pressure and temperature. This information is vital for ensuring the engine operates efficiently and safely. Engine monitoring systems typically use a combination of sensors to gather data, which is then displayed on gauges or through digital interfaces, allowing operators to monitor engine performance in real-time and detect any abnormalities that could indicate potential issues.

The other options relate to aspects of the engine's operation but do not primarily focus on monitoring pressure and temperature. The engine cooling system is responsible for maintaining the right operating temperature by dissipating excess heat, but it does not itself monitor those temperatures. The fuel management system deals with the delivery and consumption of fuel, optimizing engine performance but not directly monitoring engine parameters like pressure and temperature. The electrical discharge system, while important for the ignition and operation of various systems, does not pertain to the monitoring of temperature and pressure in the engine.