What task is related to the use of takeoff and landing performance charts?

The task related to the use of takeoff and landing performance charts is determining safe operational conditions for flights. These charts provide critical information that helps pilots and dispatchers assess various performance parameters needed for safe takeoff and landing under different conditions, such as temperature, altitude, and weight. By using these charts, dispatchers can ensure that the aircraft will be able to operate safely within the confines of the available runway length and environmental factors, which is essential for flight safety.

Monitoring passenger needs, planning flight crew breaks, and calculating aircraft speed limits are all important aspects of flight management; however, they do not directly relate to the fundamental purpose of takeoff and landing performance charts, which is to ensure the aircraft can perform safely during the critical phases of flight at either end of the journey.