Which of the following terms refers to something quite different than do the other three terms?

Question

Quizplus · Accepted Answer

The terms blended family, stepfamily, and reconstituted family all refer to a family that is re-formed following the breakup of one or more former families, either through death or divorce. These families are headed by two parents or stepparents. Single-parent families can involve a divorce or death of a parent, but can also result from being never married. Also, a single-parent family has only 1 parent living in the household, making this type of family quite different from the others.

Which of the Following Terms Refers to Something Quite Different