Realism

Jack London uses a lot of realism in the story To Build a Fire. The way he uses realism is when the guy is out by himself and his face starts to get all numb because of the cold. I think this is a form of realism because to certain people today it happens, their faces get numb and some even get frostbite as well. When he is on his way back to meet up with the boys and he's walking and his nose, ears and cheeks start to get numb and he rubs them, people in the real world do this when it's really cold. Throughout the whole story a lot of realism is used and one of the examples that stand out to me is the one about the numbness feeling. 

Cold

If the temperature goes below 50 degrees or even zero there's many consequences that can happen. One example is you might get frostbite, it happens when your body tissues freezes and some of the symptoms are when you loose feelings in some body parts. The most common places where you can get frostbite in the ear lobes, fingers, toes, and the tip of the nose. Another consequence of the temperature dropping is Hypothermia. Hypothermia happens when your body temperature falls below 95 degrees, when your body looses feeling and you feel nothing and you also get sleepy which means your like dying, you get delusions and it's very horrible. Your skin becomes dry and itchy.

Instinct

The difference between knowledge and instinct is that for knowledge you have to learn something in order to know something. Instinct is when you know something without learning it. An example of instinct is when you are born and you can sense who your mother is, you recognize her voice and touch and that's something that your born knowing. A knowledge is something you learn and you use facts to go along with it. Knowledge and instinct is two different things but somehow end up in the same category.