What is a key symptom associated with severe hypothermia?

In the context of hypothermia, a key symptom is a significant drop in body temperature. Severe hypothermia typically occurs when the body's core temperature falls below 30 degrees Celsius. When temperatures reach this range, the body's normal physiological functions are severely compromised, leading to symptoms such as confusion, lethargy, and even loss of consciousness. The chosen option accurately reflects this critical threshold for severe hypothermia, making it an essential focus for emergency medical personnel when assessing patients in cold exposure scenarios. Recognizing this temperature range is vital for appropriate intervention and management during hypothermic emergencies.