Final answer:
The most common type of family that has become more prevalent in the last decade is the single parent family, followed by various non-traditional and blended family structures.
Step-by-step explanation:
Among the types of families that have become more common in the last decade, the single parent family has shown a significant increase. According to the U.S. Census Bureau, there has been a notable growth in single-parent households, with millions of mothers and fathers raising their children alone. There is also an increase in non-traditional family structures, such as same-sex couples, unmarried couples, and diverse nuclear families, indicating a shift away from the typical two-parent nuclear family model.
While the nuclear family consisting of two married parents and children was once the norm, today's family dynamics have evolved. A decreasing percentage of children live in households with two married parents, moving away from what was previously seen as the standard family structure. Furthermore, the advent of blended families and the inclusion of extended family members in households have added to the complexity of modern family life.