What is the first action to take when someone shows signs of hypothermia?

Answer: B — Move them to a warm environment

Moving someone showing signs of hypothermia to a warm environment is the correct first action because it helps to immediately address the core issue of their body temperature dropping. Hypothermia occurs when the body loses heat faster than it can produce it, leading to a dangerously low body temperature. By relocating the individual to a warmer place, you create an environment where their body can begin to retain heat, which is critical in preventing further progression of hypothermia. In addition, a warm environment allows for more effective medical interventions, should they be necessary. For instance, in a hospital or medical setting, additional warming measures like warmed fluids or heated blankets can be administered to help stabilize the individual's condition. Other options, like panicking to get help, can lead to hasty and ineffective decisions that may worsen the situation. Giving alcohol for warmth is not advisable since alcohol can actually lower the body temperature and impair the body's ability to generate heat. Encouraging someone to exercise is also inappropriate in this scenario, as physical exertion can further exhaust the body and lead to a drop in temperature. Thus, moving the individual to a warm environment is the most effective and immediate way to manage the situation.