The family is considered the basic unit of society because it is the primary social group that provides for the physical, emotional, and social needs of its members.

A nuclear family is a family unit consisting of a husband, wife, and their unmarried children. It is the most common type of family in many societies.

Kinship refers to the social network of relatives beyond the immediate family, including grandparents, aunts, uncles, cousins, and so on.

A bilateral kinship system is one in which descent is traced through both parents, meaning that individuals inherit from and have obligations to both their father's and mother's relatives.

Parental responsibility refers to the social roles and expectations associated with being a parent, including providing for the physical, emotional, and social needs of children.

An extended family is a family unit that includes grandparents, aunts, uncles, cousins, and other relatives living together under one roof.

Lineage refers to the social bond between individuals who share a common ancestor, typically traced through either the father's or mother's line.

A patrilineal kinship system is one in which descent is traced through the father's line, meaning that individuals inherit from and have obligations to their father's relatives.

A joint family is a family unit that includes a husband, wife, their married children, and their spouses and children, all living together under one roof.

A polygamous family is a family unit in which one person has multiple spouses.

A clan is a social group consisting of individuals who share a common ancestor and live in the same locality.

A matrilineal kinship system is one in which descent is traced through the mother's line, meaning that individuals inherit from and have obligations to their mother's relatives.

An extended family is a family unit that includes a husband, wife, their unmarried children, and the husband's parents.

A single-parent family is a family unit consisting of a single parent and their children.

A tribe is a social group consisting of individuals who share a common ancestor, have a common culture and language, and live in a defined territory.