Final answer:
The communication technique being used is reflection, where the nurse restates or mirrors the client's feelings or thoughts.
Step-by-step explanation:
The communication technique being used when the nurse says, 'Tell me more about your last labor,' is reflection. Reflection is a therapeutic communication technique where the nurse restates or mirrors the client's feelings or thoughts. By asking the client to share more about their last labor, the nurse is allowing the client to explore their thoughts and emotions in a safe and supportive environment.