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Food preservation involves treating and handling food with the idea to greatly slow or stop spoilage that caused or accelerated by micro-organisms. Preservation normally involves preventing the development of fungi, bacteria along with other micro-organisms, along with the oxidation of fats which the cause rancidity. However, many ways of preservation actually use benign fungi, yeasts or bacteria to preserve food and add specific qualities, by way of example wines or cheeses. It may also include processes which inhibit aging and discoloration that occur during cooking, much like the enzymatic browning (oxidation) in apples when they are cut. Some food has to be sealed after treatment to avoid recontamination with microbes while others, including drying, mean food can be stored without special containment. There are many methods of preserving food including freezing, freeze drying, spray drying, food irradiation, sugar crystallization, adding preservatives, preserving in syrup, canning an d vacuum-packing. Children having Obsessive and Compulsive Disorder and are having Behavioral Therapy are taught concerning how to deal and manage their obsessions and compulsions without performing some actions or rituals on it. Children may in the beginning find it very difficult to go away on their own recurring and persistent thoughts and actions but as the behavior therapy continues they eventually learn on the way to manage their disorder. Behavior therapy also gives children the bravery and strength to address their symptoms.