Modernization theory analyzes how the modernization of society in relation to technology takes place. Structuralism focuses on aspects of society that impede economic growth. The basic needs theory focuses on how people's basic needs affect how they interact with society.
In food, there are many macro molecules. Among them, the main contribution towards the energy is given by the carbohydrates and fats. For the development, growth and repair our cell needs proteins and other micro nutrients like vitamins and minerals.