Which of the following is an example of a family structure?

The identified example of family structure, which is nuclear families, represents a specific formation consisting typically of two parents and their children living together. This type of family is fundamental in sociological studies of family dynamics, as it is often regarded as the traditional family unit in many cultures. Nuclear families play a vital role in society by providing emotional and economic support, facilitating socialization, and serving as the primary context for child-rearing.

In contrast, community programs, public institutions, and social services do not classify as family structures; rather, they refer to systems and services designed to support families and individuals. Community programs might offer resources and activities to enhance community engagement, public institutions include entities like schools or government agencies, and social services provide assistance or support to families in need. While they all relate to families in some capacity, they do not embody the structural aspect that defines a family unit like nuclear families do.