What type of command indicates the movement to be executed in close order drill?

The correct answer is the preparatory command. In close order drill, the preparatory command serves a crucial purpose as it indicates the movement that is about to be executed. This command prepares the unit for the action that will follow, allowing Marines to anticipate the upcoming maneuver and align themselves accordingly. The preparatory command typically includes the instruction and sets the tone for the movement, ensuring that all personnel are alert and ready to respond effectively once the command of execution is given.

The command of execution is a follow-up to the preparatory command, signaling the actual moment when the movement should be performed. Signal commands and action commands do not directly pertain to the standard structure of close order drill commands, making them less relevant in this context. The distinction between these commands is essential for understanding how orders are communicated and executed in a military environment, particularly during drills where precision and synchronization are paramount.