Final answer:
Fats and oils provide the most energy among macronutrients, with about 9 Calories per gram.
Step-by-step explanation:
Of the macronutrients, fats and oils provide the most energy. While proteins and carbohydrates both provide about 4 Calories per gram, fats and oils provide about 9 Calories per gram. This means that for the same weight, fats and oils provide more than double the energy of proteins and carbohydrates.