What is the importance of a well balanced diet?

What part of a well balanced diet do Proteins, Fats, Carbohydrates, Minerals and Vitamins play and where are they found?

The importance of a well balanced diet is to supply the body with all the necessary nutrients to keep it running smoothly and efficiently.
The food we eat is converted into energy and used by the body for all its different functions, not only physical activities but for growth and the constant repair and renewal of tissues and cells.
A well balanced diet should have the correct proportions of proteins, fats, carbohydrates and fibre, minerals vitamins and water. This can be achieved by eating wholewheat pasta, wholegrain rice, wholemeal bread, and jacket potatoes these give a good source of energy and fibre, vitamins and minerals.
Fats can be found in oily fish , such as mackerel and salmon , dairy products which should be eaten in moderation and olive oil for cooking.
Grilled or steamed chicken, turkey or fish with the skin removed provides a good source ...