Which of the following best describes the term "subcontractor"?

The term "subcontractor" refers specifically to a contractor who is engaged by the main contractor to undertake a particular aspect of a construction project. This arrangement allows the main contractor to delegate certain tasks to specialized individuals or companies that possess the specific skills or expertise required for that segment of the work. For instance, a general contractor may hire a plumbing subcontractor to handle all plumbing-related tasks, ensuring that the project is executed efficiently with the appropriate level of knowledge and experience.

In the context of the other options, managing finances, overseeing all project workers, and obtaining permits describe different roles within the construction management hierarchy. While these roles are vital for the overall success of a project, they do not align with the specific definition of a subcontractor, who focuses on executing their designated tasks rather than administrative or oversight responsibilities. Thus, option B accurately encapsulates the essence of what a subcontractor is within the construction industry.