Why do we need 'food security'?

Explanation

Food security is needed because:
(i) The poorest section of the society might be food insecure most of the times.
(ii) People above the poverty line might also be food insecure when the country faces a national disaster or calamity like an earthquake, drought, flood, tsunami, etc.
(iii) There can also be a widespread failure of crops causing famines, etc.