What components typically comprise fire and overheat warning indicators?

The correct choice focuses on the specific components designed to alert pilots and crew members to the presence of fire or overheating conditions. Engine fire lights on fire handles, along with horns and bells, provide immediate and clear visual and auditory warnings in the cockpit. This integrated warning system allows for swift attention to critical issues, enhancing safety during flight operations.

Smoke detectors, while an important element of fire detection systems, do not constitute the entire framework of fire and overheat warning indicators. Manual switches and lights offer some control functionality but do not provide the comprehensive alerting system necessary for fire situations. Temperature gauges and sensors are crucial for monitoring the operating conditions of aircraft systems but are typically part of a separate monitoring framework rather than a direct fire and overheat warning system. Thus, the answer reflects the essential components that prioritize immediate hazard alerts in aviation safety protocols.