Which of the following factors is responsible for growth in the urban population?

Reclassification of urban areas to encompass formerly rural population settlements. Net in-migration (when people move in than out). Natural increase (when birth rate exceeds death rate). All of the above

All of the above

Urban population grows as a result of natural increase (when birth rate exceeds death rate), net in-migration (when people move in than out), and sometimes reclassification of urban areas to encompass formerly rural population settlements.