Food : A necessity for human life
*    Food is essential for all living organisms because of the following reasons :
(i)     For energy requirement  to perform various functions of body to sustain life. 
(ii)    For growth : You have seen yourself growing. Without proper food, your growth would not be possible. 
(iii)    For repair of damaged or injured body parts ; when you get hurt,your skin is damaged and the blood is lost. Repair of such damaged parts takes place by the addition of new cells. 
(iv)    For protection from diseases and infection.