Here's why:
* Family is the most common and encompassing term for this definition. It's a broad term that includes various forms of family structures.
* Household is a more general term that refers to any group of people living together, regardless of their relationship.
* Nuclear family refers to a specific family structure consisting of two parents and their children. It's a subset of the broader family concept.
* Extended family includes relatives beyond the immediate nuclear family, such as grandparents, aunts, uncles, and cousins.
Therefore, family is the most accurate term to describe a group of people related by birth, marriage, adoption, and living together.