economic migration = a migrant whose soul motivation of migrating is to find employment. Migrants who already have a job may be migrating due to better pay, promotion, etc
Natural increase = population increasing due to difference between the birth rate and death rate. Usually higher in urban areas.
Hyperurbanisation = rapid population growth is outstripping the ability of authorities to provide basic needs.
Karachi: Opportunities
Pakistans financialcentre
Internal migrants looks for jobs here in banking or retail
has one of the largest ports in South Asia and is Pakistans centre of trade