Final answer:
The definition of family in America has changed to include diverse structures and is no longer limited to blood relations. Sociologists define family as a socially recognized group that forms an emotional connection and serves as an economic unit of society.
Step-by-step explanation:
The definition of family in America has changed over time and now includes diverse structures. While the U.S. Census Bureau traditionally defined family as a group of two or more people related by birth, marriage, or adoption and residing together, modern society recognizes that the concept of family is more diverse and less structured than before. According to sociologists, family is a socially recognized group that forms an emotional connection and serves as an economic unit of society, often joined by blood, marriage, cohabitation, or adoption.