Final answer:
The claim that intergenerational family relationships are very unusual in the U.S. is false. Multigenerational households declined post-WWII but have been increasingly common since 1980, with 20% of the U.S. population living in such arrangements by 2016. U.S. family structures have diversified, and the 'traditional' nuclear family is no longer the sole norm.
Step-by-step explanation:
The statement "In the United States, intergenerational family relationships are very unusual" is false. Intergenerational family relationships, where multiple generations live under one roof, have been historically common and are becoming increasingly prevalent. After World War II, there was a decline in multigenerational households, but this trend has reversed in recent years. A 2010 Pew Research Center study discovered that 49 million Americans resided in multigenerational family households. By 2016, that figure had risen to 64 million, representing about 20% of the U.S. population.
Today's U.S. families present a diverse array, with a growing percent of unmarried couples, single-parent families, and same-sex couples. These families may include extended relatives such as grandparents, cousins, or adult children sharing a home. This diversity in family structure is a reflection of various social and cultural changes in society.
Therefore, what was once considered "traditional" — a nuclear family with married parents and their children — is no longer the only norm, as households have expanded to include a broader definition of family. As society continues to evolve, the composition and perception of families in the U.S. are likely to continue changing.