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The topic sentence is missing from the following paragraph. Write your own.
"Actually they are easy to distinguish. Snack food refers to any food which is eaten between the three primary meals of breakfast, lunch, and dinner. Snack food can be any kind of food such as leftovers, candy, fruit, or a sandwich. Junk food refers to any non nutritious food such as candy and deep-fried meats. Finally, the term fast food is used for food cooked a fast food restaurants. Some fast food is also junk food as it contains high oils and salt. Ultimately, if you want food fast, eat snack food not junk food or fast food.
Possible answer:
Many find it difficult to tell the difference between snacks and meals.