Which of these is needed for a civilization to form? surplus of food democratic government written trade deals

In order for a civilization to form, it is necessary a surplus of food.

Between 4000 and 3000 BCE, the rise in agriculture and trade, allowed people to have food surplus and become economically stable. Because of that, farming was no longer essential, causing new professions and activities to thrive in a certain area and helping develop the early civilizations.

i would need the graph to answer the question

he killed his so.