Fear is a useful emotion. He warns man of the impending threat. An adult or a child feels fear and tries to find different solutions out of the situation. Fear is normal and even useful condition.After all, we all,for example, afraid of falling from the 20th floor, or when we see priblizhayuscheysya machine with high speed. So fear protects us from many ill-considered action. Fear is another medical term is called a phobia. For example, neophobia-fear of novelty. Scientists believe that this phobia is useful. Suppose the suspicion to the new food, saved people from habilis for poisoning.