Eat, sleep, mate, and defend are the basic needs of all living entities. In addition to basic needs, humans have got some extra needs that are to be fulfilled. To know about those needs, we need to look at Maslow's "A Theory of Human Motivation". According to Maslow's theory, needs are classified into five levels. Physiological needs: If a person who is lacking food, safety, love, and esteem, the person's highest priority will be food. Because a person has to be alive to meet other needs. Food, water, sleep, air, clothing fall under this category. Maslow considered these needs as important, if these needs are not satisfied up to a certain extent, all other needs(education, properties, relationships, etc,.) become simply non-existent. Safety needs: After meeting physiological needs, the vision goes towards safety and control. The need for a peaceful society that is free of criminals, wild animals, and assaults, etc., will come into the picture. The desire f...