Answer:
C. It shows the proportions of types of foods that make a balanced meal.
Step-by-step explanation:
At the beginning of this excerpt, we can notice that author's purpose is to give us some tips about a proportions of perfect meal, by taking into account our age, culture, tradition, economical situation, etc.
The author suggests to us how to make ideal proportions of our plate, by saying that half of our plate should be filled with fruits and vegetables, whole grains, and proteins. These ingredients make a balanced meal and we should use it when building a healthy diet. Based on these bullet points, we should be able to get information about the ideal proportions of a meal and make it easier to understand and implement it to our nutrition.