Final answer:
The statement is true; servers should use a towel or napkin as a barrier when pouring hot beverages to prevent burns from conduction and splashes from convection, ensuring guest safety and comfort. option a.
Step-by-step explanation:
To protect the guest from being splashed with a hot beverage, the server should indeed hold a service towel or a clean folded napkin in the left hand, between the guest and the cup, while pouring the hot beverage. The correct answer to the question is A. True. This action minimizes the risk of heat transfer by conduction, where heat would move from the hot liquid to the guest's skin, potentially causing burns. Additionally, it is a common practice in hospitality to ensure not only the safety but also the comfort of the guests.
Convection also plays a role here as it involves the movement of heat through a fluid (such as air or a liquid), which could result in splashes of hot liquid opting out of the vessel. By using a barrier such as a towel, the server minimizes the risk of convection causing discomfort to the guest. Moreover, servers must be cautious about thermal radiation from hot beverages, although it poses less of a direct risk for splashing.