Which scenario describes the formation of a blended family?

The scenario that describes the formation of a blended family involves two single parents getting married. A blended family typically consists of at least one parent who has children from a previous relationship, and when two such parents marry, they merge their families into one unit. This creates a new family dynamic where the children from previous partnerships may have to adapt to new siblings, stepparents, and possibly a different living situation, all while trying to build relationships within this new family structure.

In contrast, simply two individuals living together does not necessarily indicate that they have formed a blended family, as they may not have children or a previous family structure to blend. A couple having a child would create a nuclear family rather than a blended family unless the couple had children from previous relationships. Adopting a pet does not pertain to the concept of family formation in the context of blending existing family units. Thus, the scenario involving two single parents marrying is the clearest representation of a blended family.