City requirement refers to agglomerated settlement whose inhabitants are primarily engaged in non-agricultural activities.
Explanation:
A place is said to be city if the urban settlement has been legally incorporated into an independent self-government.
The activities that are not related to agriculture are known as non-agricultural activities. Construction, mining, handicrafts, transport etc. are some of the non-agricultural activities.
The central of the city and its surrounding suburban areas are concluded as urbanized area. The urban area is crowded with heavy population and buildings. The people in the city are mostly engaged into activities other than agriculture.