Theory:

As we have learnt in our previous chapter (Food: Where does it come from) we know about all the different kinds of food that we eat. We eat different meals a day such as breakfast, lunch and dinner which comprises of different foods. Have you wondered why do eat so differently and what is its use?
This topic helps us in understanding that why do we eat different kinds of food, what are the various components of these foods and what is its use.
 
What are we going to learn?
 
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Components of a meal
People from different states have different kind of foods. That is, if you look at the dishes of a North-India, for lunch, they will have chapathi (flat-bread), dal (lentils) and butter. But, in South-India most of the states will have rice, sambhar (lentil-based vegetable curry) and bhindis (lady's finger), brinjals as essential part of their cuisine. You can make a list of these menus.  
 
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South Indian meal
 
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North-Indian meal
Nutrients
All these dishes have some ingredients which we get from animals and plants. These ingredients makes us healthy and energetic to work. Every ingredient that we consume daily has carbohydrates, proteins, fat, vitamins, minerals, dietary fibres and water collectively known as nutrients.
 
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Components of food
Among these the 4 major nutrients are as follows:
  1. Carbohydrates (sugars)
  2. Proteins (building blocks of the body)
  3. Fats
  4. Vitamins and minerals
In order to be healthy one should consume a variety of ingredients. Hence, we have different dishes in our meal.
These nutrients are essential to make a balanced diet thereby making a person healthy.