Which factor does NOT contribute to a balanced meal?

The correct answer focuses on an essential concept in nutrition. A balanced meal comprises a variety of food groups, proper portion sizes, and typically includes all essential food groups to provide the body with the necessary nutrients. Reducing food waste, while environmentally and ethically important, does not directly influence the nutrient balance or composition of a meal.

In practice, a balanced meal should ideally include fruits, vegetables, whole grains, lean proteins, and healthy fats, each contributing essential vitamins, minerals, and macronutrients. Variety in food choices ensures that individuals receive a broader spectrum of nutrients, while controlling portion sizes helps in managing caloric intake and maintaining a healthy weight. Hence, reducing food waste, although a commendable practice, does not alter the compositional aspects that define a balanced meal.