Development:- It is good for someone while bad for others. Different people have different development goals. It sometimes is destructive. Compare different countries:- To compare countries their per capita income is most important, the country with more capita income is more developed than countries with less per capita income. Q.1. Why per capita income to compare the countries? => Per capita income is used to compare countries because it shows the annual income of a person of that country. Total income is not taken because all countries have not same population, all have different population. To find per capita income f a country the total income is divided by the total population of that country. The average income is also called per capita income. Q.2. What criterion World Bank use to compare countries? => The main criterion used by the World Bank is peer capita income. The countries have per capita income more than 12616 US$