(b) Four reasons for high population density of Lagos
(i) Lagos is a commercial town - heavy trading and presence of banks
(ii) Presence of industries
(iii) Availability of employment (or jobs)
(iv) Lagos had been the Federal Capital.
Four reasons for low population of Makurdi
(i) Problems created by trans-Saharan slave trade
(ii) Presence of tse-tse flies and black flies associated with sleeping sickness and blindness respectively
(iii) Absence of social amenities
(iv) Absence of mineral resources and industries.