Which of the following is one of the four food groups?

Dairy products are indeed one of the four food groups that are essential for a balanced diet. They are a key source of calcium and other vital nutrients, which are important for the development and maintenance of strong bones and teeth. Dairy includes milk, cheese, yogurt, and other milk-based products, all of which provide important protein and vitamins, particularly vitamin D and B12.

In contrast, sweets, fats, and processed foods are not considered one of the foundational food groups necessary for providing essential nutrition. Sweets generally contain high levels of sugars and provide little in the way of vitamins and minerals. Fats can be an important part of the diet, but they are often categorized separately, focusing on healthy versus unhealthy fats rather than as a primary food group. Processed foods vary widely in their nutritional content and often include added sugars, salts, and preservatives, making them less healthy compared to the whole food groups like dairy. Thus, dairy products are correctly identified as a crucial component of a balanced diet.