Final answer:
The U.S. Fair Housing Act protects national origin, religion, and familial status, but not age.
Step-by-step explanation:
The U.S. Fair Housing Act prohibits discrimination in housing based on certain protected classes. National origin, religion, and familial status are all protected classes under this act. However, age is NOT a protected class in the U.S. Fair Housing Act.
Learn more about Protected classes in the U.S. Fair Housing Act