Final answer:
The three nutrients that provide the body with energy are carbohydrates, proteins, and lipids. These macronutrients are essential for energy production, maintenance, and repair of the body, and are broken down during digestion to be used by our cells.
Step-by-step explanation:
The three nutrients that provide the body with energy are carbohydrates, proteins, and lipids (fats and oils). These macronutrients are essential for energy production and are found in both plant and animal-based foods. When you eat foods that contain these nutrients, your digestive system breaks them down into molecules small enough to be absorbed and then used for energy. Carbohydrates and lipids are the primary sources of energy-yielding nutrients, as they can be converted into ATP, which is the energy currency of cells. Proteins, while they can also provide energy, are mainly utilized by the body to supply amino acids, which are the building blocks for maintaining and repairing tissues.
These nutrients are not only a source of energy but some, like proteins and certain fats, are also vital for other functions such as cellular maintenance and the production of enzymes, hormones, and other important molecules. The balance and quantity of these nutrients are crucial for optimal health and physical performance.