Which of the following nutrients is primarily responsible for providing energy to the body?

Carbohydrates are primarily responsible for providing energy to the body. They are the body's main source of fuel, as they are easily broken down into glucose, which is then used to produce energy for cellular processes. When carbohydrates are consumed, they are converted into glucose during digestion and enter the bloodstream, where they are transported to cells and tissues for energy use.

Although proteins and fats can also provide energy, they are not the body's primary energy source. The body prefers carbohydrates because they can be quickly mobilized and utilized for energy, especially during high-intensity activities. In contrast, vitamins do not provide energy; rather, they play essential roles as co-factors in metabolic processes.