What term refers to the subset of the labor force population that is available for selection using a particular recruiting approach?

The term that accurately refers to the subset of the labor force population available for selection through a particular recruiting approach is "Applicant population." This term specifically describes those individuals who have expressed interest in a job vacancy and have taken steps towards applying for that position. The "applicant population" highlights the active candidates who are engaging with the hiring process, thereby forming a clear understanding of the available pool for recruitment from which hiring decisions will ultimately be made.

In contrast, other terms may encompass broader or different concepts. For instance, "employment pool" could refer to the general set of individuals available for employment, but does not specifically indicate their active application status. Similarly, "candidate reservoir" might imply a collection of potential candidates, but could lack the specificity regarding those who have actively applied. "Job market," on the other hand, refers to the overall economic environment where job seekers and employers interact, which is much wider and does not pertain exclusively to those actively seeking employment in a particular opportunity.