The answer is physical and mental work.
Human Resources means using humans as a resource. So any company that has employees that work in a physical or mental capacity are using Human Resources. This is different from using machines or computers to do the work, we are only talking about work done by the minds and/or bodies of humans.
Here is the answer that would best complete the given statement above. Until a national database was created, background checks under the Brady act were suspended following the supreme court’s ruling in <span>Printz v. United States. Hope this answers your question.</span>