Which of the following best describes a one-parent family?

A one-parent family is best described as a family configuration where a single mother or father lives with their children. This structure can arise from various circumstances such as divorce, separation, or the death of a partner. In this type of family, the lone parent is responsible for the upbringing and day-to-day care of the children, which can encompass emotional and financial support, as well as decision-making.

In contrast, the other options describe different family structures. The first option outlines a nuclear family where both parents are present, while the second refers to a family that includes extended relatives such as grandparents, aunts, or uncles, which is not specific to one parent. The fourth option speaks to multicultural families that combine different cultural backgrounds but does not address parent presence specifically. Thus, the defining characteristic of a one-parent family—having one parent and their children—makes the selected answer the most accurate choice.