Final answer:
Defining 'family' is difficult due to the diversity of family structures influenced by cultural variances, and sociologists indeed focus on familial bonds over static roles. Modern family structures vary widely, encompassing different forms of emotional and economic bonds.
Step-by-step explanation:
The term 'family' can be difficult to define due to the numerous family structures that exist across different cultures. Indeed, the varieties of families displayed in the world's cultures make a universal definition challenging. There is a significant difference between a family of orientation, which is the family into which a person is born, and a family of procreation, formed through marriage. These categories encompass the diversity of family compositions, reflecting both the social and emotional bonds that tie family members together as well as their economic interactions within society.
Indeed, the concept of family varies greatly across different cultures, and sociologists often focus on the relationships and bonds within a family unit rather than a fixed set of roles. The fact that modern U.S. families may present in various forms compared to historical norms highlights the changing trends and diversity in family structures.