Final answer:
The nurse refusing to return the client's personal effects to detain them is an example of false imprisonment.
Step-by-step explanation:
The nurse refusing to return the client's personal effects in order to detain them is an example of false imprisonment. False imprisonment occurs when someone intentionally restricts another person's freedom of movement without legal justification. In this case, the nurse is unlawfully preventing the client from leaving the facility by holding onto their personal belongings.