Answer:
90% of the world population lives in about 10% of its total land area, whereas remaining 10% population has spread over 90% of land area. The reasons are:
(i) Density of population is high in river valleys due to water availability through rivers and canals. The soil and water makes the land usable for agriculture.
(ii) The plains are densely populated while hilly areas and desserts are sparsely populated.
(iii) Population also depends on climatic conditions. Hot, cold and dry climates have sparse populations example: Tundra region is very cold all the time with snow, these are less populated, in desserts due to accute scarcity of water and without agriculture the area remains sparse populated. But areas of moderate climate have dense population.
(iv) Areas such as Gangatic plains, deltas. North Indian plain have higher proposition of population, because oi: fertile soil with possibility of agriculture.
(v) Development of Transport network, industrialisation and urbanisation are some important socio-economic and historical factors which, influence the distribution of population.
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