What is the purpose of the flaps in a Cessna 172?

The purpose of the flaps in a Cessna 172 is to increase lift and drag during takeoff and landing. Flaps extend from the wing's trailing edge, altering the wing's shape and surface area, which provides additional lift at lower airspeeds. This is particularly beneficial during takeoff, as it allows for a shorter takeoff distance, and during landing, as it reduces the stall speed, permitting a safer approach and landing configuration.

While the other options touch on aspects related to flight, they do not accurately describe the primary function of flaps. For instance, flaps do not primarily reduce drag during cruise; in fact, their deployment generally increases drag. They also do not directly enhance stability in flight, nor do they control yaw during landing. Instead, the main role of flaps is to manage lift and drag effectively, making them crucial during the critical phases of flight when speed and lift are most essential.