Answer:2, and 4. Frostbite, and Hypothermia.
Explanation:Heat stroke is cause by to much heat beeing trapped in your body, with no way of getting out. Fristbite is caused by the liquid in your body begining to freeze in your extremidies. Heat Exaustion is caused when you get really hot, and have not consumed enough liquid, this leads to dehydration. Hypothermia is when your body loses heat faster than it can produce heat, causing a dangerously low body temperature.