Final answer:
The nurse performing a workplace hazard walk-through is engaged in primary prevention, which aims to prevent health problems before they occur by addressing potential risk factors.
Step-by-step explanation:
The nurse conducting a walk-through to identify workplace hazards is implementing primary prevention. Primary prevention strategies are aimed at preventing disease or injury before it occurs by removing or reducing disease or injury-causing factors. In the context of the workplace, this could include identifying and mitigating potential hazards to prevent occupational injuries or illnesses. This contrasts with secondary prevention, which involves early detection and prompt treatment of diseases or injuries to halt their progression, and tertiary prevention, which focuses on helping people manage long-term, complex health problems or injuries to prevent further physical deterioration and maximize quality of life.