Classify parts of the world according to levels of economic development and quality of life.

Classifying parts of the world by levels of economic development and quality of life involves analyzing various indicators that reflect the prosperity and well-being of populations. Economic development can be measured through metrics such as Gross National Income (GNI) per capita, which indicates the average income of a country's citizens. Quality of life encompasses broader aspects, including access to education, healthcare, and basic necessities like clean water. By examining these factors, we can categorize countries into groups such as low-income, middle-income, and high-income, helping to identify disparities and target areas for improvement.