Final answer:
When parents, grandparents, and children all live together, the household is referred to as a 'grandfamily,' which is a type of extended family structure.
Step-by-step explanation:
When parents, grandparents, and children all live together, the household is referred to as a 'grandfamily,' which is a type of extended family structure.
When all three generations (parents, grandparents, and children) of a family live under the same roof, this family structure is often referred to as an extended family. An extended family includes not just the nuclear family of two parents and their children, but also other relatives such as grandparents, aunts, uncles, and cousins. In the given options, the term grandfamily specifically refers to a household where grandparents and at least one other generation live together, which closely matches the scenario of parents, grandparents, and children all residing under one roof. Therefore, the correct answer would be option 5) grandfamily.