The correct answers are A) cities. B) canals and waterways. C) specialized labor. E) communication and writing.
The elements of civilization are the following: cities, canals and waterways, specialized labor, and communication and writing.
When humans could establish a form of a complex society with urbanization and a form of government, humans started to form a civilization. The oldest human civilization was Sumeria. They settled in between the Tigris and Euphrates Rivers in the Middle East, in what today is Iraq. The established important city-states such as Lagash, Uruk, Kish, Nippur, Edu, and Ur.