Family structure refers to the composition and organization of a family unit, which can vary widely across cultures and societies. Common types include nuclear families, extended families, and single-parent families, each with unique dynamics and roles within the household. Understanding family structure is essential for recognizing how families function and support their members. For instance, a nuclear family typically consists of two parents and their children, while an extended family may include additional relatives such as grandparents or aunts and uncles, providing a broader support network.