World Geography
What is the opportunities provided by a country’s demographics in which the working population is much more than the dependent population called?

Age structure composition
Demographic Gap
Real population Density
Demographic Dividend

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World Geography
The relative abundance of dissolved salts in seawater in descending order is as follows

chlorine, sodium, magnesium, calcium, potassium, sulphate
sodium, chlorine, magnesium, potassium, sulphate, calcium
chlorine, magnesium, calcium, sodium, potassium, sulphate
chlorine, sodium, sulphate, magnesium, calcium, potassium

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