Which signal should not cause alarm as it indicates non-urgent communication?

The chosen signal is correct because Signal 6 is typically used to convey non-urgent communication among law enforcement agencies. This indicates that the situation is not critical and does not require immediate action or response. In emergency situations or when urgent communication is needed, other signals are employed to alert officers and ensure quick responses. Understanding the distinction between various signals helps officers prioritize their actions effectively, ensuring they respond appropriately based on the urgency communicated within the signal system.