Final answer:
A typical nuclear family is comprised of two parents and their children, but recent data shows that traditional nuclear family structures have become less common, with increasing diversity in family arrangements.
Step-by-step explanation:
The nuclear family can be seen as the nucleus of the group, traditionally comprising a married couple and their children. However, U.S. Census data from 2010 showed that only 66 percent of children under seventeen years old live in a household with two married parents, a decrease from 77 percent in 1980. Variations of the nuclear family have risen in recent years, with three percent of children living with two cohabiting parents. Furthermore, family structures have diversified to include single-parent households, unmarried couples, and expanded households with extended family members such as grandparents.