(a) Food is necessary for the growth and development of the body. A balanced diet provides all the required raw materials and energy in appropriate amount likes proteins, carbohydrates, fats, minerals, etc.(b) Health is a state of being well enough to function well physically, mentally and socially and these conditions depend on the surrounding environmental conditions. For example, if there are unhygienic conditions in surrounding area, it is likely we might get infected or diseased.(c) Our surrounding area should be free of stagnant water. This is so because many waterborne diseases and insect vectors flourish in stagnant water which causes diseases in human beings.(d) Human beings live in societies and different localities like villages or cities, which determines the social and physical environment and hence both are to be kept in harmony. Public cleanliness is important for individual health. For better living conditions lot of money is required. We need good food for healthy body and for this we have to earn more. For the treatment of diseases also, one has to be in good economic condition.