Which of the following displays fuel consumption and fuel economy?

The correct answer, which identifies the component that displays fuel consumption and fuel economy, is the Fuel Management Gauge. This gauge is specifically designed to provide real-time information about how much fuel the engine is using, as well as the overall efficiency of fuel usage over time. It helps the operator to monitor performance effectively, which is crucial for optimizing fuel efficiency and determining consumption levels under various operating conditions.

The other options serve different purposes: the Speed Display shows the speed of the vehicle, the Tachometer indicates the engine's RPM (revolutions per minute), and the Trim Angle Gauge provides information about the angle at which the boat’s hull is sitting in the water. None of these displays directly provide information on fuel consumption or fuel economy, making the Fuel Management Gauge the only appropriate choice for this inquiry.