Final answer:
The UAP action that requires nursing intervention is assisting the client to put on slippers prior to ambulation. The nurse should directly supervise and assist the client with this activity to ensure their safety.
Step-by-step explanation:
The correct answer is b. Assisting the client to put on slippers prior to ambulation. This action requires nursing intervention because it involves patient safety and falls prevention.
Helping the client put on slippers before walking may seem like a simple task, but it is important for preventing slips and falls. The nurse should directly supervise and assist the client with this activity to ensure their safety.