Read the paragraph about carbohydrates. It seems as if every modern diet plan includes an elimination of carbohydrates from one’s diet. "Carbs” are being shunned as everyone seeks out "low-carb” foods and diets. But not every carbohydrate is a cookie; not every "carb” should be rejected. Consider a healthy bowl of pasta and vegetables before a swim or a run. Pasta can provide athletes with energy and a feeling of fullness and satisfaction that might not come from vegetables alone. What is the controlling idea?