Final answer:
Blended families are created when previously married parents with children remarry, creating a new family structure with step-siblings and step-parents.
Step-by-step explanation:
Families that consist of previously married spouses and their children are known as blended families. A blended family is formed when divorced or widowed parents with children from previous relationships remarry, joining two families into one. Blended families are recognized for combining multiple original family units, making them unique from nuclear families (a single couple and their children) and extended families (which includes a broader circle of relatives such as grandparents, aunts, uncles, and cousins).