What are fleet subdivisions referred to as?

The correct answer is "Task Force." In naval terminology, a task force refers to a group of ships or units that are organized for a specific mission or operation. This concept is especially relevant in naval operations, where various assets are combined to achieve strategic objectives. A task force can encompass several types of units, including ships, submarines, and aircraft, and is typically created to address a particular situation or purpose, illustrating the flexibility and responsiveness of naval forces.

In contrast, terms like "squadrons," "flotillas," and "divisions" describe different organizational structures within a fleet but do not capture the specific purpose-driven nature of a task force. Squadrons usually refer to groups of ships or aircraft aligned for operational tasks, flotillas often denote smaller, more specialized groups within the fleet, and divisions are organizational levels that can encompass various components of a fleet, focusing more on internal structure than targeted operational missions.