Port-holes were used for ____.

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Detailed Solution

Port-holes were used for entrance.
Many skeletons have been discovered at some of the burial sites. Historians believe these were family burial grounds. On the surface, stone circles or boulders were placed. They served as landmarks to help people find burial sites. Megaliths may contain more than one skeleton. These indicate that people, possibly from the same family, were buried in the same location but not at the same time. Those who died later had their bodies brought into the grave through the portholes. Stone circles or boulders placed on the surface most likely served as waypoints to the burial site, allowing people to return to the same location whenever they wanted.

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