Final answer:
Carbohydrates, proteins, lipids, water, vitamins, and minerals are all essential nutrients needed by the body for energy, building materials, and body processes.
Step-by-step explanation:
Nutrients are substances that the body needs for energy, building materials, and control of body processes. There are six major classes of nutrients: carbohydrates, proteins, lipids, water, vitamins, and minerals. Vitamins and minerals are nutrients needed in much smaller amounts compared to carbohydrates, proteins, lipids, and water.