Human wants show important charecteristics.They are unlimited in numbers.One will never come to the end of his wants so long as one lives.Although human wants put together can never be satisfied yet a particular wants is satiable...The commodities used for the satisfaction of wants may be classified as Necessaries, comforts and luxuries... By "Necessaries" we mean those commodities and services the want for which must be satisfied...Necessaries has been classified as
(1) Necessaries of life which refer to commodities that are absolutely essential for our very existence.
(2) Necessaries of efficiencies,and
(3) Conventional necessaries...