Which type of system is best described as a variable volume/terminal reheat system?

A variable volume/terminal reheat system is designed to modulate the flow of air based on the heating and cooling demands of a space, making it an efficient solution for maintaining comfortable temperatures. This system allows for the adjustment of air volume at different zones, reducing energy consumption when full airflow isn't necessary.

In a terminal reheat system, air is cooled to a lower temperature in a central unit and then reheated at terminal units (like VAV boxes) before being delivered into occupied spaces. This method helps maintain precise temperature control, responding dynamically to varying conditions within each zone. The ability to vary the volume of airflow while still reheating (as needed) is integral to the system's operation, which aligns perfectly with the description in the question.

Other options like constant flow and fixed capacity do not accommodate the variability required for efficient temperature management, making them less suitable than a variable volume/terminal reheat system for applications demanding adaptability to changing conditions.