Select two items that a civilization must have before cities can exist. enough farmland large population of non-farmers large amount of industry complicated road system enough food

The two items that a civilization must have before cities can exist would be "enough food" and "a large population of non-farmers," due to the fact that  these factors allow a "division of labor". Option 2 and the last one are correct.

Civilization can be defined as the stage of human social as well as cultural development and organization that is believed to be most advanced.

an era of negotiation.

is that an answer to your question?