Major Components of Food
1. Carbohydrates
Carbohydrates are one of the major components of food which provide energy to the body. They are found in foods like bread, rice, pasta, and fruits. Carbohydrates are broken down into glucose which is used by the body for energy.
2. Proteins
Proteins are essential for growth, repair, and maintenance of body tissues. They are made up of amino acids which are necessary for various bodily functions. Sources of proteins include meat, fish, eggs, dairy products, and legumes.
3. Vitamins
Vitamins are organic compounds that are essential for various metabolic processes in the body. They do not provide energy but are crucial for overall health and well-being. Vitamins are found in a variety of foods like fruits, vegetables, dairy products, and whole grains.
4. Fats
Fats are another major component of food that provide energy and help in the absorption of fat-soluble vitamins. They also play a role in maintaining healthy skin and hair. Sources of fats include oils, butter, nuts, and avocados.

Explanation
Vitamins are not classified as a major component of food because they are not a source of energy like carbohydrates, proteins, and fats. While they are essential for various bodily functions, they are required in smaller amounts compared to the other major components of food. Vitamins are important for overall health and well-being, but they are not considered a primary source of energy for the body.