Why did cultures of eastern North America build mounds?

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- ### Religious ceremonies

- ### Burial site.

- ### Astronomical observatories

- ### Territorial markers

- ### Platforms for dwellings, temples, or other structures such as palisades.

- ### Agricultural purposes, such as raising food in floodplains or improving soil drainage

- ### Water management system

- ### Mortuary rites or commemorative events: Some mounds may have been used for honoring the dead

- ### Social and political purposes : To assert power and wealth

Hope this helps