Final answer:
The statement about protein having the highest calorie content per gram is (b) false. Both carbohydrates and proteins provide 4 calories per gram, while fats offer 9 calories per gram, making them more calorie-dense.
Step-by-step explanation:
In comparing the energy provided by the three macronutrients, one gram of carbohydrates and one gram of protein both provide approximately 4 calories, whereas one gram of fat provides around 9 calories. This means that fatty foods are more calorie-dense and have a higher energy density than proteins or carbohydrates.
It is important to understand the calorie content of proteins, carbohydrates, and fats for a balanced diet. Proteins are crucial for building and repairing tissues, but as an energy source, they provide the same amount of calories as carbohydrates. Excess intake of any of these nutrients can lead to energy being stored as fat in the body.