Final answer:
The nurse is performing the evaluation standard of practice.
Step-by-step explanation:
The nurse is performing the evaluation standard of practice.
In the nursing process, evaluation is the final step that involves assessing the client's response to interventions and determining the effectiveness of the care provided. By returning to check on the client's level of pain after implementing interventions such as administering pain medication, repositioning, and dimming the lights, the nurse is evaluating the client's response to the interventions.