The city development index is a way to measure how well a city is doing in different areas, like health, education, and economy. Think of it like a report card for a city. Just like how your teacher gives you grades for different subjects, the city development index gives scores to cities based on how they're doing in different areas.
For example, if a city has good schools and lots of jobs, it might get a higher score in the education and economy categories. On the other hand, if a city has poor air quality or a high crime rate, it might get a lower score in the health or safety categories.
The index takes into account lots of different factors, like access to basic services, infrastructure, and environmental sustainability. By looking at these factors, people can get an idea of how livable a city is and where it needs to improve.
So just like how you try to do your best in school to get good grades, city leaders try to do their best to improve their city's score on the city development index. This can lead to better opportunities and quality of life for everyone who lives there.