1. The Mound Builders primarily lived in what regions? Select all that apply.

The Mound Builders primarily lived in:

1. North America (because digging mounds in Antarctica would have been quite challenging)
2. The Midwest region (where they perfected the art of mound building and also created fantastic places to roll down)
3. The Southeast region (where they built mounds big enough to host epic picnics)
4. The Ohio River Valley (where mounds became fashionable accessories for the landscape)

So, based on these selections, they mainly lived in North America, the Midwest, the Southeast, and the Ohio River Valley. Just remember, mounds weren't just for ants, the Mound Builders had their own reasons too!

To determine the regions where the Mound Builders primarily lived, we need to conduct a quick research. Here's what you can do:

1. Open a web browser on your computer or smartphone.
2. Type "Mound Builders" into a search engine, such as Google or Bing.
3. Look for reputable sources, such as archaeological websites, academic journals, or museum websites.
4. Click on relevant search results to gather information about the Mound Builders.
5. Pay attention to the geographic locations mentioned in the sources.

Now, since I cannot perform step-by-step searches for you, I can still provide you with some information. The Mound Builders were a prehistoric civilization that lived in North America. Based on archaeological findings and historical records, the Mound Builders primarily lived in the following regions:

- The Ohio River Valley (including present-day Ohio, Indiana, and Kentucky)
- The Mississippi River Valley (including present-day Illinois, Missouri, and Arkansas)
- The Great Lakes region (including present-day Wisconsin, Michigan, and Minnesota)

Please note that there were various distinct cultures within the Mound Builders, and their settlements and mounds can be found in other regions as well, but the regions mentioned above were particularly significant for their presence.

Therefore, the regions where the Mound Builders primarily lived are:
- The Ohio River Valley
- The Mississippi River Valley
- The Great Lakes region

The Mound Builders primarily lived in the following regions:

1. Ohio River Valley
2. Mississippi River Valley
3. Great Lakes region
4. Southeastern United States