Which nutrients provide energy to the human body?

The correct answer focuses on carbohydrates, proteins, and fats as the primary nutrients that provide energy to the human body.

Carbohydrates are the body's main source of energy. They are broken down into glucose, which fuels not only the brain but also muscles during physical activities. Proteins, while primarily known for their role in building and repairing tissues, can also be used as an energy source when carbohydrate intake is low. Fats provide a highly concentrated source of energy, delivering more calories per gram compared to carbohydrates and proteins. They are essential for long-duration, low-intensity activities and serve various vital roles, including hormone production and absorption of fat-soluble vitamins.

In contrast, vitamins, minerals, and water do not directly provide energy. While they are essential for various bodily functions, such as metabolic pathways and maintaining homeostasis, they do not yield calories. Fiber, while important for digestive health, also does not provide energy in the form of calories. Minerals contribute to processes like muscle contraction and nerve function, but they are not energy sources themselves.