Final answer:
The number of non-traditional households in the United States is indeed increasing, with a rise in unmarried couples, same-sex couples, single-parent households, and expanded households. This is changing the traditional concept of what a family is.
Step-by-step explanation:
In the United States, the number of non-traditional households is on the rise. According to the U.S. Census Bureau, the percent of unmarried couples, same-sex couples, single-parent households, and single-adult households is increasing. Additionally, the number of expanded households, where extended family members live together, is also growing. This shift in family structure is changing the traditional idea of what constitutes a family.