Which action is NOT a method of passive rewarming?

Passive rewarming refers to methods used to help individuals regain their body heat using the heat generated from their own body rather than introducing an external heat source. The correct choice indicates a method that does not align with this definition.

Using radiant heat lamps involves applying an external heat source directly to the patient's body. This method actively increases the body temperature by delivering heat from an outside source, which contradicts the concept of passive rewarming.

In contrast, actions such as wrapping with a blanket, having the patient drink hot beverages, and covering with heavy clothing aid in conserving the patient's own body heat or utilizing the heat produced internally. Wrapping with a blanket and covering with heavy clothing help trap body heat, while drinking hot beverages can warm the body from the inside. Thus, the only option that represents an active approach rather than a passive one is the use of radiant heat lamps.