Which of the following is an example of a macronutrient?

Proteins are classified as macronutrients because they are one of the three main nutrients that provide the body with energy and are essential for various biological functions. Macronutrients are required in large amounts in the diet, and they include carbohydrates, fats, and proteins. Proteins play a crucial role in building and repairing tissues, producing enzymes and hormones, and supporting immune function.

Vitamins and minerals, on the other hand, are considered micronutrients because they are needed in smaller quantities. While they are vital for different physiological processes, they do not provide energy in the same way that macronutrients do. Fiber, though important for digestive health, is classified as a type of carbohydrate and does not provide calories, making it distinct from proteins as a macronutrient.