Final answer:
The quick construction of the house, as explained by Greta, was most likely due to a skilled workforce and efficient team divisions, which parallels historical construction projects. Modern construction methods and societal support also play crucial roles in speeding up the building process.
Step-by-step explanation:
According to Greta, the house got built so quickly likely due to the involvement of a skilled workforce and the division of labor into efficient teams. Historical construction projects, such as those from ancient civilizations and the medieval period, often involved complex organization and employed large numbers of people, including both permanent skilled craftsmen as well as seasonal conscripted crews.
The use of modern construction equipment and technologies like computer-aided machines and robotics has also significantly sped up the process of building in contemporary times. Moreover, large constructions are often supported by broader societal structures like governments, corporations, or churches, and can involve contributions from the communities they serve.