Answer and Explanation:
As shown in the text above, the Skara Brae was built with stones. Despite being in Europe and wood being more efficient as a thermal insulator for cold weather, wood was very scarce in this region, with stones being a more appropriate material to build houses, as you can see in the remains of this community. Many scientists believe that the roofs of these houses were made from whale ribs and the bones of other animals.
Historians believe that Europe's very cold weather during the winter was the reason the residents of this house left the region. In addition to the fact that their stone houses did not protect them from the intense cold, the region did not have enough food for them during the colder seasons.
It is important to emphasize that Skara Brae is considered a historical heritage by UNESCO.