Question

Which were the areas where states and cities were most densely clustered?

Answer 1

There are several factors which determine the population density within state and city. 

Human being needs food, shelter, and water to live. So areas where there is abundant water supply such as river or lake, density is more. Areas where there is nice weather allowing lots of food crops to grow, density is more. 

Other than food, and water, Job availability is important factor in modern world. So areas where industries are developing or are developed have highest density. For example, Mumbai which is hub of everything. Bangalore, Noida, Hyderabad which are IT hub, population is extensive. 

There are also minor factors that affect population are transport facilities, politics etc things also affect population. 

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Answer 2

Answer:

Population distribution is a term used to describe how humans are spread across the Earth. Population distribution across the Earth is uneven. Some areas are densely populated whereas others are sparsely populated.

The land surface of the Earth accounts for around 30% of its area. However, only around 11% of the land surface can be comfortably inhabited by humans. There are many human and physical factors that affect population distribution and population density across the world.