Hypothermia related to cold exposure.
ANSWER: Pyrexia (Fever): Pyrexia, often known as fever, is typically caused by an underlying infection. The immune system’s response to ailments like fungi, viruses, or bacteria causes it. When the body senses the presence of these foreign invaders, it produces pyrogens, which operate on the hypothalamus in the brain. The hypothalamus then elevates the body’s …