Answer: 1- the standard of living in a country.
Explanation: The standard of living is a measure of the material aspects of an economy. It counts the amount of goods and services produced and available for purchase by a person, family, group, or nation.
The generally accepted measure of the standard of living is GDP per Capital. This is a nation's gross domestic product divided by its population. The GDP is the total output of goods and services produced in a year by everyone within the country's borders. it can also be measured using the gross national income divided by purchasing power parity.