What do prefabricated models mean?

Prefabricated models refer to construction techniques where components of a building or structure are manufactured in a factory setting and then transported to the construction site for assembly. This method allows for interchangeable sections to be built ahead of time and then slipped into place at the final location, significantly reducing the time needed for on-site construction and allowing for greater precision in manufacturing.

The other options do not accurately capture the essence of prefabrication. For instance, structures built on-site and those requiring extensive assembly on-site involve more traditional construction methods where materials are assembled at the final location, which is the opposite of the prefabrication approach. Temporary structures that are later replaced would imply a very different context where the structures are not intended to be permanent, diverging from the concept of prefabrication, which is generally focused on durability and efficiency.