How can pilots confirm they are on the correct flight path?

Pilots can confirm they are on the correct flight path primarily by cross-referencing their instruments. The cockpit is equipped with various instruments that provide critical information such as altitude, heading, airspeed, and navigation data. By utilizing these instruments, pilots can ensure they are following the planned route and making any necessary adjustments based on real-time data, which helps maintain situational awareness and adherence to the flight plan.

Instruments like the primary flight display (PFD) and multifunction display (MFD) are specifically designed to show the aircraft’s position relative to the intended flight path, as well as external factors like weather or terrain. This information is vital for safe navigation and decision-making during all phases of flight.

While other options might provide some information, they do not offer the level of precision and reliability that instrument data provides. Communication with passengers does not relate to confirming flight paths, checking cabin lights pertains more to passenger comfort and safety, and observing outside conditions may not provide accurate or immediate information regarding the aircraft's navigation status.