Which of the following terms is used to categorize the personnel assigned to a unit temporarily for specific tasks?

The correct answer is the term that best describes personnel assigned to a unit temporarily for specific tasks, which is a "Task Force." This term is used to indicate a group of individuals from various units brought together to work collectively on a specific mission or objective for a limited period. Task forces are often formed in response to a particular operational requirement or event, allowing for flexible and efficient resource allocation.

In contrast, "Temporary Assignment" is more of a general term that could refer to any short-term assignment without emphasizing the unit-based collaboration aspect. "Decentralized Force" typically refers to the dispersion of command and operational authority rather than a temporary grouping for task execution. "Task Organization" is closely related to arranging resources and personnel for a specific operation but does not exclusively imply the temporary nature of the assignments like a task force does.

Therefore, understanding that a task force brings people together from different units for a specific task aligns closely with military operational strategies, making it the most appropriate choice in this context.