What is the role of servo tabs in an aircraft's control system?

Servo tabs play a crucial role in an aircraft's control system by reducing the control forces on primary flight controls. They function as a secondary control surface that aids the pilot in moving the primary control surface, like an elevator or aileron, with less effort. When the pilot inputs a command, the servo tab moves in such a way that it creates an aerodynamic force that assists in moving the primary control surface. This is especially beneficial in larger aircraft, where the control surfaces can be heavy and require significant force to operate. By employing servo tabs, pilots can experience lighter controls and improved handling characteristics.

While the other options may refer to aspects of flight control systems, they do not accurately describe the primary function of servo tabs. They are not primarily designed to reduce drag or address lateral stability issues directly, nor do they automatically adjust for wind resistance in a way that is central to their operation. Their main purpose is to assist with control force reduction, making them an important feature for effective flight handling.