1. BODY PARAGRAPH 1: Economic causes
1.1. Introductory sentence
1.1.1. First, the primary cause of cities becoming so crowded is economic.
1.2. Supporting sentences
1.2.1. As a country develops, its cities become the engines of development, thus jobs are available in these areas.
1.2.2. For example, Tokyo was the motor for Japan's rapid economic development in the 1960's and 70's.
1.2.3. As a result, its population increased rapidly as workers moved to Tokyo to establish economic security for themselves and their families there.
2. BODY PARAGRAPH 2: Educational causes
2.1. Introductory sentence
2.1.1. Second, another factor in the huge increase in urban populations is education.
2.2. Supporting sentences
2.2.1. Thousands of people migrate to the cities for educational purposes.
2.2.2. The best universities are always located in big cities and this attracts thousands of students every year.
2.2.3. After their school years, most graduates settle down and work in the city.
3. INTRODUCTION
3.1. Hook
3.1.1. The fact that the cities in the world are getting more and more crowded is well-known.
3.2. Lead-in
3.2.1. There is a significant decrease of inhabitants in the countryside and its surroundings but cities such as Tokyo, Sao Paolo or Shanghai are now considered mega-cities for their huge populations.
3.3. Thesis Statement with Map Points
3.3.1. Cities are becoming so crowded for economic, educational and social reasons.
4. CONCLUSION
4.1. Signal of the last paragraph of the essay
4.1.1. In conclusion,
4.2. Restatement of the Thesis Statement
4.2.1. economic, educational and social factors are the major causes of huge urban populations. People will always move to the areas which provide more opportunities and to the places which can give them the freedom they desire.
4.3. Final comments and remarks
4.3.1. This phenomenon is taking place in plenty of cities and in the long run, minor cities would probably disappear.
5. BODY PARAGRAPH 3: Social causes
5.1. Introductory sentence
5.1.1. Finally, cities are becoming overcrowded because people have their own social issues. .
5.2. Supporting sentences
5.2.1. Young people would move because big cities are more cosmopolitan than the countryside and such fact would be good for their personal freedom.
5.2.2. For instance, youngsters who belong to the LGBTQ community tend to choose big cities as its inhabitants are probably more open-minded than those from the surroundings