Read the following passage carefully and answer the questions below: 

While eating food we should bear in mind that we do not eat to satay our hunger or to fill the belly, we eat to preserve our health. For good health we need good food. Sometimes it so happens the people who love even in the midst of plenty do not eat foods they need for good health because the have no knowledge of the science of health and nutrition . They do not know how to selete balanced diet from many foods those area available to them. One of the main reasons of malnutrition in Bangladesh is our ignorance of the knowledge of nutrition. Again, the poor and illiterate people in our country generally think that good and nutritive food means a costly food. They do not know that whatever food they get coud be good and nutritive if they could selet the food items wisely to make it a balanced one.