1. Development involves improving people's lives through goals like better living standards, equality, freedom of thought and expression, and access to recreation and leisure.
2. Development is a complex economic, political, and social process that can involve conflicting goals among individuals. It considers a variety of factors beyond just income.
3. Countries can be compared based on total national income, average income, and other factors like literacy rates and health that are important for development but difficult to measure. Per capita income comparisons have limitations and do not show disparities within countries.