Which of the following families includes children from previous relationships?

A blended family includes children from previous relationships, which is often formed when one or both partners in a relationship have children from past marriages or partnerships. In this family structure, parents merge their lives together while also integrating their children, promoting an environment where siblings may not share biological parents but still fulfill familial roles.

In contrast, an extended family generally refers to a broader family structure that includes relatives beyond the immediate family, such as grandparents, aunts, uncles, and cousins. This configuration does not specifically involve the merging of children from separate relationships.

A childless family, as the name suggests, is one without children, which means it cannot encompass children from previous relationships.

A foster family is one that provides temporary care for children who are not able to live with their biological parents, often due to significant circumstances. While these families may include children who are not related by blood, they are not defined by the merging of children from prior relationships of adult partners.

Thus, the correct answer signifies the unique characteristic of a family structure that specifically incorporates children from previous relationships.