Which command indicates to cadets that they can move and relax after an inspection is over?

The command that indicates to cadets that they can move and relax after an inspection is over is "Dismissed." This command signifies the conclusion of the formal activity, allowing cadets to leave their positions and engage in more relaxed behavior. It is a clear signal that they are free to move about without the restrictions typically present during an inspection or drill.

While "At ease" and "Rest" may suggest a temporary relaxation of posture while still within the formation, they do not convey the same finality as "Dismissed." "Cease fire" pertains to stopping firing during a training exercise or drill and is unrelated to the context of the inspection and following relaxation of movement. Therefore, "Dismissed" effectively communicates the end of the event and the freedom to move, making it the correct choice.