Final answer:
a.NonmaleficenceIt is the responsibility of the nurse to do no harm to clients. The nurse is applying the ethical principle of nonmaleficence by requesting to transfer this client to a unit better able to manage their behavior and thereby prevent injury to others on the unit.
Step-by-step explanation:
The nurse applies the ethical principle of nonmaleficence in this situation. The principle of nonmaleficence states that we should act in ways that do not cause harm to others. By requesting to transfer the client to a unit that is equipped to manage violent behavior, the nurse is aiming to prevent injury to others on the unit. This aligns with the ethical principle of nonmaleficence, as it seeks to do no harm to clients.