Which of the following is NOT considered one of the six major nutrients?

The correct choice indicating that alcohol is not considered one of the six major nutrients highlights an important distinction in nutritional science. The six major nutrients recognized by dietary guidelines include carbohydrates, proteins, fats, vitamins, minerals, and water. Each of these plays a critical role in the body's functioning and supports overall health.

While alcohol provides energy (calories), it does not supply the essential nutrients that the body requires for growth, maintenance, and health. Therefore, it is categorized separately from the major nutrients necessary for nutrition. Recognizing that alcohol falls outside this classification is significant in understanding balanced diets and the role of substances in nutrition.

The other options - carbohydrates, proteins, and fats - are indeed essential macronutrients that the body needs in larger quantities for energy, structural functions, and various metabolic processes. Their inclusion among the six major nutrients reflects their fundamental importance in nutrition.