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?

Real population Density
Demographic Gap
Age structure composition
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
chlorine, sodium, sulphate, magnesium, calcium, potassium
sodium, chlorine, magnesium, potassium, sulphate, calcium
chlorine, magnesium, calcium, sodium, potassium, sulphate

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World Geography
In which rocks does most of the formation of caves take place?

Quartzite
Granite
Limestone
Sandstone

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