Look at the following diagram about the composition of milk. Write a paragraph explaining why milk is considered to be a well-balanced food.

Milk contains all the nutrient substances,such as proteins 3.5%,fat 3.8%,carbohydrates or sugar 4.8%,vitamins and minerals  0.7% necessary for growth,but is deficient in iron.such a secretion from a cow is used as human food. Since milk contains all these important elements of a good food,it is considered  a well-balanced diet.

Thank you