Final answer:
The call light should be placed within easy reach of the resident when a nursing assistant leaves the room to ensure the resident can alert staff if needed.
Step-by-step explanation:
When a nursing assistant leaves a resident's room, it is important to place the call light within easy reach of the resident, ideally within hand's reach. This is a standard safety procedure to ensure that the resident can quickly alert staff if they require assistance. Properly positioning the call light helps maintain the safety and well-being of the patient, and it is a key responsibility of a nursing assistant or any healthcare provider leaving a patient's room.