Which categories of nutrients are known to provide energy?

The chosen answer is accurate because carbohydrates, proteins, and fats are the primary macronutrients that provide energy to the body. Each of these nutrients plays a crucial role in metabolic processes, allowing the body to perform various functions and maintain energy levels.

Carbohydrates are often the body's preferred source of energy, as they can be rapidly broken down into glucose, which is then used as fuel. Proteins, while primarily used for growth, repair, and maintenance of tissues, can also be converted into energy when needed, though this is not their primary role. Fats are the most energy-dense macronutrient, providing a concentrated source of calories, and are important for prolonged energy needs.

In contrast, vitamins and minerals, while essential for numerous biochemical processes and supporting overall health, do not provide energy as they do not contain calories. Water and fiber also do not offer energy; water is vital for hydration and various bodily functions, while fiber aids digestion and supports gut health without being a source of energy. Finally, antioxidants and enzymes are important for protecting cells and catalyzing biochemical reactions, respectively, but they do not supply energy themselves.

Thus, carbohydrates, proteins, and fats are specifically categorized as the nutrients that are known to provide energy,