Concept:Staffing means filling and keeping filled the positions in the organisation.
Explanation:An enterprise needs qualified managers and skilled workers to operate.
Staffing involves recruiting, selecting, training, and developing these personnel.
It ensures that the right people are placed in the right positions.
Directing, controlling, and planning do not focus mainly on human resource provision.
Therefore, the correct term for providing qualified managerial and other skilled personnel is staffing.
Answer: D. Staffing