Which of the following are all examples of aerodynamic balances?

Aerodynamic balances are mechanisms or designs that help improve the stability and control of an aircraft by reducing the forces acting on control surfaces. The correct answer highlights several specific types of balances that serve to enhance the effectiveness of these control surfaces.

Horn balances, balance tabs, and internal balances are all engineering features used in the design of control surfaces, such as ailerons, elevators, and rudders. Horn balances extend beyond the hinge line of the control surface, reducing the control force needed to move the surface. Balance tabs work by moving in opposition to the control surface, thereby helping to offset aerodynamic forces and making it easier for pilots to control the aircraft. Internal balances are designed within the structure of the control surfaces themselves to achieve similar effects.

In contrast, the other options consist of elements that are related to aircraft performance or structure but don't pertain specifically to aerodynamic balances. For example, weight, thrust, and drag are fundamental forces acting on an aircraft but do not encompass the concept of balance mechanisms. Ailerons, elevators, and rudders are indeed the control surfaces themselves but do not reflect the specific balancing mechanisms. Similarly, stabilizers, wings, and fuselage refer to major components of the aircraft structure rather than the specific balancing features used in controlling