Answer:
Shara Brae
Step-by-step explanation:
The statement "They are being erected to defend the real world against something dangerous inside the enclosure" best applies to Skara Brae. Skara Brae is a Neolithic settlement in Orkney, Scotland, and the structures there are believed to have served as a form of defense or protection against external threats, potentially harsh weather conditions or other dangers, given their enclosed nature and construction.