The correct option is A Health.
Health is an important component of population composition which affects the process of development. So we need a healthy population. (a) The health of a person helps him/her to realise his/her potential and gives the ability to fight illness. (b) A healthy person is an asset to the country, is more productive and helps' in the progress of the country. (c) A healthy person is able to earn more and improve his standard of living. (d) A healthy population makes a healthy and strong nation economically and socially.