What are the three main types of foods? What are their constituents? Elaborate.

Types of food:

There are three main types of foods are energy giving foods, body-building foods, and protective foods.

1. Energy-giving foods: They are made of carbohydrates and fats. Carbohydrates are known to provide energy, whereas fats are known to store energy in the body in need.
   
2. Body-building foods: Proteins are considered to be body-building foods as they help in physical growth and repair damaged cells and tissues of the body.
   
3. Protective foods: Protective foods are mainly vitamins and minerals since they protect us from many diseases. They help us fight against infections, heal wounds and protect the body against foreign organisms.