Which nutrient group is primarily responsible for energy storage?

Carbohydrates are primarily responsible for energy storage in the body. They serve as a major source of energy for physical activity and metabolic processes. When carbohydrates are consumed, they are broken down into glucose, which is utilized by cells for immediate energy. Any excess glucose can be stored in the liver and muscles as glycogen for later use. This ability to store energy in a readily accessible form makes carbohydrates key players in energy management.

Proteins, on the other hand, are primarily involved in building and repairing tissues, making enzymes, and supporting immune function. They do provide some energy, but their main role is not energy storage. Vitamins are essential for numerous biochemical functions and physiological processes, while minerals are crucial for structural and metabolic functions. However, neither vitamins nor minerals play a direct role in energy storage. Thus, the correct answer highlights the essential role of carbohydrates in the body's energy storage mechanisms.