Final answer:
A registered nurse provides an independent nursing intervention when administering oral medications, administering oxygen, and providing emotional support.
Step-by-step explanation:
An independent nursing intervention refers to an action taken by a registered nurse without the need for direct supervision. Out of the options given, administering oral medications, administering oxygen, and providing emotional support are examples of independent nursing interventions. Administering intravenous medication, on the other hand, may require the nurse to work under the guidance or order of a healthcare provider.