Which of the following factors contributes to the aircraft's yawing tendency?

The correct choice indicates a comprehensive understanding of the factors that contribute to an aircraft's yawing tendency. Yaw refers to the rotation of an aircraft around its vertical axis, and several elements can influence this motion.

Propeller torque is significant because as the engine produces thrust, it also generates a counteracting rotational force on the aircraft's airframe. This torque can cause the aircraft to yaw toward the opposite direction of the propeller’s rotation.

Weight distribution plays a crucial role as well. An uneven distribution of weight across the aircraft can lead to asymmetrical forces acting on the aircraft during flight, which can promote yawing in the direction where more weight is concentrated.

Wind effects, such as crosswinds, can also induce yaw. When the aircraft is exposed to winds coming from the side, it may cause the aircraft to yaw away from the direction the wind is coming from, requiring the pilot to apply corrective rudder input to maintain coordinated flight.

By recognizing that all these factors contribute to the aircraft's tendency to yaw, the answer captures a holistic view of the dynamics at play. Each element interacts with the aircraft in a way that influences its balance and direction, making ‘all of the above’ the most accurate response.