Final answer:
Performing wound dressing changes is a nurse-initiated intervention, while administering prescribed medication, ordering diagnostic tests, and adjusting medication dosage are physician-initiated interventions.
Step-by-step explanation:
A nurse-initiated intervention is an action that the nurse can autonomously perform without needing a physician's order. Performing wound dressing changes is a nurse-initiated intervention because nurses are trained to assess and dress wounds to promote healing and prevent infection. Administering prescribed medication, ordering diagnostic tests, and adjusting the dosage of a medication are all physician-initiated interventions, as they require specific orders from a physician.