1. why is it important to include foods high in calcium and vitamin d in the diets of
four- and five-year olds?

Vitamin D is a nutrient that helps the body take in calcium from the foods that we eat. Together, calcium and vitamin D build bones and keep them strong. Vitamin D also plays a part in heart health and fighting infection.

Calcium is needed for our heart, muscles, and nerves to function properly and for blood to clot. Inadequate calcium significantly contributes to the development of osteoporosis. Many published studies show that low calcium intake throughout life is associated with low bone mass and high fracture rates. National nutrition surveys have shown that most people are not getting the calcium they need to grow and maintain healthy bones. To find out how much calcium you need, see the "Recommended calcium intakes" chart below.

Explanation: so that everything can grow properly and be big and strong