What best describes a single-person household?

A single-person household is best described as an individual living alone. This concept emphasizes the presence of one person who occupies a dwelling independently, without any cohabitants. Such households are increasingly common in modern societies and reflect various social trends, such as urbanization and changes in family structures.

In contrast, other options describe different living arrangements. A group of unrelated people living together refers to a communal setting that does not fit the criteria for a single-person household. A nuclear family typically consists of two parents and their children, which again prevents it from being classified as a single-person household. Lastly, a couple living together indicates a shared household among two individuals, further distinguishing it from the solitary nature of a single-person household.