Which type of group is characterized by being temporary and focused on one specific subject or problem?

A task force is specifically designed to address a particular issue or problem within a limited time frame. Its primary characteristic is its temporary nature, as it is formed to tackle a specific goal or project that requires focused attention. Once the task is completed or the issue is resolved, the task force is usually disbanded. This allows for a concentrated effort from a group of individuals who may come from different areas of expertise or departments to collaborate effectively on the issue at hand.

In contrast, a workgroup tends to be more permanent, formed for ongoing work or projects that require continuous effort. Committees are typically established for a more extended period to oversee specific ongoing activities or functions, while advisory boards serve a consultative role, often providing recommendations and guidance rather than direct involvement in executing tasks. Each of these alternatives lacks the same temporary and focused nature that defines a task force, making the latter the correct choice for this question.