Which family structure is characterized by a married couple, their children, and relatives from another generation all living under one roof?

The family structure characterized by a married couple, their children, and relatives from another generation all living under one roof is the extended family. This model includes not just the immediate family (parents and their children) but also incorporates additional relatives such as grandparents, aunts, uncles, or other relatives, which creates a broader support network and shared living environment.

In an extended family, members often share responsibilities, caregiving, and resources, fostering a close-knit community within the household. This arrangement can be culturally significant in many societies, where extended family living is a traditional norm that emphasizes collective family support and unity.

In contrast, a blended family consists of parents who have remarried and their children from previous relationships, while a nuclear family refers to just the two parents and their immediate children without additional relatives living with them. An unmarried family typically involves partners who are living together but are not legally married, distinguishing it from the traditional family structure described in the question.