Which of the following lists the four main forces acting on an aircraft in flight?

The correct answer identifies the four fundamental forces acting on an aircraft in flight: lift, weight, thrust, and drag.

Lift is the upward force generated by the wings as air flows over them, which enables the aircraft to rise off the ground. Weight is the force acting downward due to gravity, pulling the aircraft toward the earth. Thrust is the forward force produced by the aircraft's engines, propelling it through the air. Drag is the resistance force that acts opposite to the direction of thrust, arising from the friction and pressure differences created as the aircraft moves through air.

These four forces interact constantly during flight, determining the aircraft's performance and behavior. Understanding how these forces work together is crucial for pilots when managing flight dynamics.

Other options may miss the correct definitions of these forces or use redundant or irrelevant terms, highlighting the importance of correctly identifying these four fundamental forces for a comprehensive understanding of aviation principles.