The four densely populated areas of the world and their main characteristics are described.

The world's four most populous regions:

1.Western Europe.

These areas developed earlier in industry and developed economy, so they are densely populated.

2.Indus Valley: This area has excellent natural conditions, early agricultural development, and has historically nurtured a large population.

3.Yangtze River and Yellow River Basin.

It has excellent natural conditions and early agricultural development, and has historically supported a large population (the same as the Indus Valley).

4.The Great Lakes of North America.

Eastern United States): These regions developed earlier in industry and developed economies, so they are densely populated (same as in western Europe).

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1. Four densely populated regions: eastern and southern Asia, Europe and eastern North America.

Four sparse areas: high latitudes, alpine plateaus, arid deserts, and hot and humid undeveloped tropical rainforests.

2. The geographical distribution of the world's population is very uneven, and the distribution of the population is closely related to natural conditions. The vast majority of the world's population lives in the mid-latitudes, with more concentrated populations in plains and basins with warm, humid climates and abundant precipitation. Plains at low and middle latitudes.

The eastern and southern parts of the Eurasian continent, the central and northern parts of the North American continent, the central and southern parts of the South American continent, and the western part of the Australian continent. Most of the area is 30 degrees north and south, the atmosphere is declining, rainfall is abundant, most of the place is plains, there are a large number of rivers such as the Yangtze River in China, the Yellow River in the United States, the Mississippi River in the United States, the Amazon River in Brazil, etc., which are located in the monsoon zone, bringing marine aquatic fresh water

Eastern and southern Asia: good natural conditions, rain and heat at the same time climate suitable for the growth of rice, abundant water sources, flat terrain, long history of development.

Western Europe: Early industrial development and developed economy.

Around the Great Lakes of North America: the climate is suitable, the water is abundant, the resources are abundant, the industrial base is good, and the economy is developed.

East Asia: East coast of China. Japan.

Korea. South Asia: Southeast Asia:

India. Pakistan. Thailand.

Indonesia. Western Europe: United Kingdom.

France. Germany. North America:

Great Lakes region. In addition, Africa's population growth rate remains high. It is likely to become the most densely populated area in the world.

I feel that the eastern part of the United States is not the fourth most densely populated area (although the textbook says so), Southeast Asia covers an area of about 4.57 million square kilometers and has a population of about 100 million, which is about the same area as the eastern part of the United States, but the population is more than twice that of the United States.

1. The most densely populated in the world.

The four regions are East Asia.

Dept. of Southern Asia, Europe, Eastern North America. The common characteristics of these four regional backs are: A: In terms of land and sea position, the middle and low latitude coastal areas; Warm and humid in terms of climate; In terms of topography, plain areas.

2. Sparsely populated areas of the world and their causes: northern Africa (Sahara Desert) is an extremely arid desert region, northern South America is a humid and hot rainforest region, Antarctica is a high latitude region with severe cold all year round, and Central Asia is a plateau and mountainous area with high terrain.

3. The most populous continent is Asia, followed by Africa, and the least is Oceania (except Antarctica).

The four most densely populated zones in the world are: the eastern and southern parts of Asia; the western part of Europe; North America and the eastern part of South America, because these regions have superior natural conditions, warm and humid climate, developed economy, and convenient transportation

So the answer is: the four most densely populated zones in the world are: the east and south of Asia; the western part of Europe; North America and the eastern part of South America, because these regions have superior natural conditions, warm and humid climate, developed economy, and convenient transportation

The world's most densely populated regions are mainly found on the eastern coast, southeastern and southern parts of Asia; Western Europe. Eastern North America and other regions.

Map of the world's population distribution.