Which of the following is NOT one of the three components of the fire support system?

The fire support system consists of various components that work together to coordinate and deliver artillery fire effectively. Among the key components are the observer, who observes the target and provides vital information; the firing cell, which is responsible for the planning and controlling of fire missions; and the firing elements, which are the units that execute the fire missions, such as artillery batteries.

The artillery division, while an integral part of military structure and operations, is not classified as a direct component of the fire support system itself. Instead, it serves a broader organizational role that might encompass several fire support assets. By distinguishing between the units involved in the direct action of fire missions and the overall higher-level organization, the correct answer identifies the artillery division as separate from the essential components that constitute the fire support mechanism.