What makes fire?

  While Brian lost in the woods, he tried his best to survive. Since nobody would know where he was, he had to bestow his knowledge whether from playing or watching TV show. For the sake of survival, he required to have fire, which could warm him up, having cooked food, and even glowed his way. Since he haven't made a fire before, he figured out by himself. First, Brian tried to make fire by friction. He intended to rub two sticks together until there was enough heat for a fire. Unfortunately, his speed wasn't as fast as enough to be-- it was failed. Through an accident, Brian was attacked by a porcupine, but he suddenly found another method which might make a fire--hatchet. Therefore, Brian tried to produce sparks by hitting the hatchet, and the sparks will make fire. Because it required a lot of strength, he needed to hit the hatchet enough times in order to make fire. Although he was tired and exhausted, he knew that how significance was that to light up his life.......Finally, Brian achieved the goal, he made a fire successfully, and he truly warm his heart.