a) hunter gatherers who built mounds
The various cultures collectively termed "Mound Builders" were inhabitants of North America who, during a circa 5,000-year period, constructed various styles of earthen mounds for religious, ceremonial, burial, and elite residential purposes.
Germanic tribes such as the Franks, Ostragoths, Vandals and the Visigoths were surrounding it and weakening it by spreading into their territory, and also it was having internal governmental issues and struggles for consolidation of power.
Answer:
there knowadgle about hunting fishing and farming
Explanation:
