The Mound Builders were inhabitants of North America who built various styles of mounds mostly for religious and burial purposes, 5000 years ago. Most lived in the regions of the Great Lakes, the Ohio River Valley, and the Mississippi River valley,
Based on the map presented, The Mound Builders primarily lived in regions C and D where Mississippi and Ohio Valley are located.
Laborers who had previously worked on farms transitioned to working in factories. Cities became a source of poverty, illness and lacked housing due to the transient volumes
