Which of the following systems can actuators be attached to in an aircraft?

Actuators in an aircraft play a critical role in converting energy into motion and are commonly associated with the movement of various parts of the aircraft. When considering the attachment of actuators, the most relevant answer is the aircraft structure.

The actuators are typically mounted on or integrated within the aircraft structure to facilitate interaction with control surfaces, landing gear, and other mechanical components. The structure provides the necessary foundation and support for the actuators to perform their functions effectively. For example, in the case of flight control systems, actuators are often attached within the structures that house the control surfaces, allowing them to operate efficiently while ensuring structural integrity during flight.

While other options, such as control surfaces and various systems, may also involve the use of actuators, the term "aircraft structure" encompasses the broader framework that physically supports the possibility of integrating actuators into multiple systems throughout the aircraft. Understanding this relationship highlights the importance of the aircraft's design in accommodating and optimizing actuator performance within the overall system.