Which of the following terms best describes a location used for surveying enemy movements?

The term that best describes a location used for surveying enemy movements is "observation post." An observation post is specifically designed for the purpose of monitoring and collecting intelligence on enemy activity. It serves as a vantage point where personnel can observe the battlefield discreetly, gather information, and relay it back to their units for situational awareness and strategic decision-making. This is crucial in military operations for gaining insights into the enemy's movements, intentions, and strengths.

In contrast, a base camp typically serves as a logistical and operational hub for troops but is not primarily focused on surveillance or intelligence gathering. A deployment area is related to the positioning of troops and equipment in preparation for operations rather than ongoing observation of enemy movements. A command center is essential for coordinating operations and making strategic decisions but does not specifically function as a site for direct observation of enemy activity. Thus, the observation post stands out as the most appropriate choice for surveying enemy movements.