Which family structure includes a couple and their children living together without additional relatives?

The nuclear family structure consists of two parents and their children living together as a single unit, distinct from other family forms that may include additional relatives. This definition emphasizes the immediate relationship between parents and their offspring, highlighting the focus on the direct family members residing in one household without the presence of aunts, uncles, grandparents, or other relatives.

In contrast, a single parent family involves just one parent raising children, a blended family consists of parents who have remarried, bringing together children from previous relationships, and an extended family includes relatives beyond the immediate family, such as grandparents or cousins, living together or in close proximity. The clarity of the nuclear family structure lies in its simplicity and focus on the core family unit, making it a fundamental concept in discussions concerning family dynamics.