Cities are very densely populated because there are a lot of opportunities for a job. There are also plenty of places to send children to school. In bigger cities there are also more schools so if you were going to school you could have a choice on which school you wanted to go to. There would also be responses to bad weather such as a lot of snow the plows would be out or if there was an issue at home there are homes and shelters.
Explanation: This limestone was near the ocean floor the collisions of tectonic plates cause this limestone to move up, because of the combination of streaching and lifting and futhermore was not exposed to pressures or heat to metamorphose.