Final answer:
The significant change in family life since the 1960s is the rise in blended families and stepfamilies, while the concept of 'personal family' is defined as a government-defined unit for data purposes.
Explanation:
The most significant change to family life since the 1960s has been the rise in blended families and stepfamilies. This shift reflects the evolving structures and dynamics of modern families, moving away from the traditional nuclear family model.
The concept of 'personal family' refers to a government defined unit used for census and policy purposes. It helps in categorizing and understanding family structures for data analysis and policy-making.
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