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Final answer:Food additiveslike sorbic acid, benzoic acid, propionic acid, nisin, and natamycin are used to maintain the nutritional quality of food, prevent microbial growth, and make food more attractive. They are not primarily used to keep food free from rodent filth but protect against microbiological contaminants.Explanation:The main role of food additives is to preserve food and maintain its nutritional quality, making it more attractive, and preventing microbial growth. They include compounds likesorbic acid, benzoic acid, propionic acid, nisin, and natamycin. For example, sorbic acid and its soluble salts are used to prevent the growth of molds in certain foods, while sulfites are used to prevent browning of foods.These additives also include sulfur dioxide and nitrites, used in the preservation of dried fruits and meats respectively. High levels of salts can be used in food to inhibit microbial growth. However, while these additives ensure food safety to a great extent, they don't completely keep food free from all impurities; their primary role is not necessarily to keep food free from rodent filth but rather to protect againstmicrobiological contaminants.Learn more about Food Additives here:brainly.com/question/33729146#SPJ11...