Answer:
(a) All body activities are interconnected and require energy
and raw material from outside the body which are provided by balanced diet. So,
it is necessary for maintaining healthy body.
(b) Health is a state of well-being, that efficiently functions
physically, mentally and socially. These conditions depend upon the
surrounding environmental condition.
For example, if there is unhygienic conditions in surrounding
area, it is likely that we might get infected or diseased.
(c) This is so because many water-borne diseases and insect
vectors flourish in stagnant water, which cause disease 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 condition, lot of money is required. We
need good food for healthy body and for this we have to earn more. Good
economic conditions are also required for treatment of diseases.
(e) Vaccination is necessary for infants to prevent them from
various diseases. Immune system of infant is not strong, so timely vaccination
against major diseases (e.g., polio, TB, chickenpox, etc) protect them from catching
disease.
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