Another term for an illegal alien in the U.S. is an undocumented non-U.S. citizen.
The correct answer is "an undocumented non-U.S. citizen." To arrive at the answer, you should be familiar with the terminology used to describe individuals who are residing in the United States without proper legal authorization. In this case, "illegal alien" is commonly used but has become less preferred over time. The more acceptable term is "undocumented non-U.S. citizen" because it avoids the negative connotations associated with the term "illegal." It is important to use accurate and respectful language when discussing immigration status.
