Why is it important for a seller-server to understand the effects of alcohol on the body?

Understanding the effects of alcohol on the body is crucial for a seller-server because it enables them to ensure responsible service to customers. This knowledge helps in recognizing signs of intoxication and understanding how different individuals may react to alcohol based on various factors such as weight, gender, and food intake. By being aware of these effects, a seller-server can proactively make informed decisions regarding when to refuse service, thereby minimizing the risk of over-intoxication and potential harm to customers and others. This responsibility not only promotes a safer environment but also helps in upholding the establishment's compliance with legal obligations concerning alcohol service.