The correct answer is option 3, vitamins. Vitamins are essential nutrients that the body needs in small amounts for various functions such as growth, development, and metabolism. While they are crucial for overall health and well-being, vitamins do not provide any energy directly. Energy is primarily obtained from macronutrients such as fats, proteins, and carbohydrates. Fats provide the highest amount of energy per gram, followed by carbohydrates and proteins. These macronutrients are broken down during digestion and converted into a form of energy called ATP, which is used by cells for various processes. It is important to note that while vitamins themselves do not provide energy, they play a vital role in the metabolism of macronutrients and the production of ATP.