Family is a set of people related by blood, marriage (or some other agreed-upon relationship), or adoption who share the primary responsibility for reproduction and caring for members of society.
Nuclear Family - Consists of mother, father and child or children.
Extended Family - Consists of grandmother, grandfather, mother, father and child or children.
Single Parent Family - Consists of mother or father and child or children.
Reconstituted Family - This is a Step Family - Which is where the mother or father are divorced and then marry again so they have step children.
Household - This is the name of people who live under the same roof.