In tombs inside pyramids! :)) hope this helped
Answer:
Mound builders are known for the various cultures collectively termed "Mound Builders" were inhabitants of North America who, during a 5,000-year period, constructed various styles of earthen mounds for religious, ceremonial, burial, and elite residential purposes.
Explanation:
Meat Inspection Act, Prosecution of Northern Securities, Pure Food and Drug Act, Children's Bureau of Labor, Federal Trade Commission, and the Clayton Anti-Trust Act