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1. ' Gross Domestic Product’? Gross Domestic Product (GDP)  is the value of all final goods and services produced within a country during a particular year. GDP shows how big the economy is. Many students write  final value (instead of final goods) and they also do not write  the word "services " 2. Developed and developing countries - Countries that have achieved high literacy rates, high income, a good index of health, and higher living standards (more expenditure on consumer goods) are considered developed countries. and countries making progress and relatively at low levels in all aspects as compared to developed countries are known as developing countries. this concept is not associated with higher income alone, a country must achieve growth in all indicators to be termed as developed. many Arab nations have high national incomes but they are not considered as developed because they are lacking in other indexes. 3. Literacy rate- The proportion of the literate po...