Which radar technology is utilized to monitor air traffic control?

The correct choice is height finding search radar, which plays a vital role in air traffic control by determining the altitude of aircraft. This technology allows air traffic controllers to maintain safe distances between aircraft, ensuring that they are appropriately separated both laterally and vertically during flight operations.

Height-finding capabilities are particularly useful in managing traffic in congested airspace and at airports, where precise information about an aircraft's altitude is crucial for safe landing and takeoff procedures. By accurately identifying the height of an aircraft, controllers can facilitate smoother operations in the vertical dimension, preventing potential collisions and contributing to overall safety in aviation.

Other radar technologies mentioned, while valuable in their respective applications, do not serve the primary function of altitude monitoring in air traffic control. For instance, missile guidance radar focuses on targeting for defense systems, surface search radar is primarily used for maritime activities to detect ships or land, and tracking radar may be related to following specific moving objects but might not provide the precise altitude data essential for air traffic management as effectively as height finding search radar does.