I want to know the answer to the following question:
At what speed did urban settlements sometimes expand?
All the background I'm provided with is that "Due to a surplus in production the economy began to expand resulting in urbanization thus creating urban areas which grew and evolved very rapidly in some cases, such as that of Çatal Höyük in Anatolia and Mohenjo Daro of the Indus Valley Civilization in modern-day Pakistan.". Is that enough to answer the question?
Answer: yes