Answer:
executive, effector, comparator, error signal
Step-by-step explanation:
The correct answers are: "A closed-loop control system is made up of four distinct parts: an executive for decision making about errors, an effector for making decisions, a comparator to compare feedback to, and an error signal, which is the information acted on by the executive."
A Closed-loop Control System is a series of mechanical or electronic devices whose function is to automatically control a process variable with no human interaction at all.