What does the final approach leg directly lead to?

The final approach leg is a critical segment of the landing pattern in aviation. It directly leads to the threshold of the landing runway, which is the point where the aircraft meets the runway to safely touchdown. During this phase, pilots line up the aircraft with the runway for landing, ensuring they are properly configured and at the correct altitude and speed for landing.

This part of the approach is essential as it allows pilots to maintain the proper flight path as they descend towards the runway. Successfully completing the final approach leg sets the stage for a safe landing, which is a primary goal of every flight.

The other options do not accurately reflect the function of the final approach leg. For instance, the altitude needed for takeoff and the exit from the runway are not relevant to the process of landing, while the holding pattern is a method of managing air traffic when an aircraft cannot land immediately, situated before the final approach phase.