Which person would NOT be protected under the familial status definition according to federal fair housing law?

Under federal fair housing law, particularly the Fair Housing Act, familial status protection applies to households with persons under 18 years of age living with a parent or guardian. This definition includes children living with anyone who has legal custody or with someone who is in the process of obtaining custody.

In the scenario presented, a 19-year-old girl living with her mother would not be considered a protected person under the familial status definition. Familial status protections are focused on minors under 18, so once an individual reaches 18, they are no longer covered by this specific protection.

In contrast, the 17-year-old boy and the 14-year-old girl qualify for protection because they are both minors. The mention of the person seeking legal custody further reinforces the consideration of familial status protections for minors. The 21-year-old pregnant woman is also protected because she may have a child or be expecting a child, and familial status extends to individuals caring for the well-being of children, even if they are not yet born.

Thus, the choice highlighting the 19-year-old is not protected under this particular aspect of federal fair housing law, making it the correct answer to the question.