Which of the following best defines a balanced meal?

A balanced meal is best defined as one that contains a mix of proteins, fats, and carbohydrates. This is important because each of these macronutrients plays a vital role in the body’s functioning. Proteins are essential for building and repairing tissues, fats provide energy and support cell growth, and carbohydrates are the body's primary source of energy. When all three macronutrients are included in a meal, it contributes to overall health and can help maintain energy levels, support metabolic functions, and promote satiety.

In contrast, a meal consisting solely of carbohydrates would lack essential proteins and fats that are needed for a well-rounded diet. Meals low in fiber but high in sugar do not provide the necessary nutrients for sustained energy and can lead to unhealthy spikes in blood sugar levels. Additionally, meals based mainly on processed foods often lack the balance of nutrients and can be high in unhealthy additives, fats, and sugars while being low in beneficial nutrients. Thus, the correct answer emphasizes the importance of a balanced mix of macronutrients for optimal nutrition.