What describes someone who previously lived in a household?

The correct answer is "Member of a household" because this term encompasses anyone who resides in a specific household, including those who may no longer live there. This designation implies a more permanent association than merely visiting or being a relative. A member of a household can include family members as well as roommates, highlighting the broad nature of the term that applies to anyone who was part of the living arrangement at any time.

In contrast, the other choices imply more specific relationships. A "Roommate" is typically someone who shares a living space, often with a formal agreement, and may not capture the full range of individuals who could have lived in a household, such as family members or friends. "Family member" specifically refers to individuals related by blood or marriage and does not encompass non-relatives who have lived in the household. A "Visiting relative" suggests someone who comes to stay temporarily but does not indicate a permanent previous residence in that household, which further distinguishes it from being a member of that household.