Barb and frank recently adopted twin girls. the four of them live together in the suburbs. this constitutes what sociologists would call a (n) extended family. household. social group. family.

This would be considered a family under sociological terms. The parents and the children are living together, which differs from extended families, in which the children and parents do not share the same living quarters. Households, by definition, are made up of single persons or unrelated people living together in a communal-type setting, rather than a kinship setting.