What helps a plane to fly?

A plane flies primarily due to the principles of aerodynamics, which involve four key forces: lift, weight, thrust, and drag. Lift is generated by the wings as air flows over and under them, creating a pressure difference. Thrust is produced by engines, propelling the plane forward, while drag is the resistance encountered due to air friction. The balance and interplay of these forces enable the aircraft to ascend, cruise, and descend safely.