Final answer:
An air liaison officer is a subordinate operational component of a tactical air control system designed to provide air support to land forces and control aircraft.
Step-by-step explanation:
A tactical air control system is a complex network of components that work together to provide air support to ground forces. One important component of this system is the air liaison officer (ALO). The ALO is a subordinate operational component of the tactical air control system that serves as the link between the ground forces and the aircraft. They are responsible for providing air support and coordinating the control of aircraft in support of land operations.