Minerals can not be made of organic materials
Much pollution fills the air because of train s which let off steam that contains chemicals.
Answer: D - geographic isolation
Explanation:
When the value of a country’s currency falls, the currency is depreciating, so one unit of that currency can buy fewer units of other currency.
A depreciation of a country's currency makes its export goods cheaper for foreigners and domestic residents find that foreign imports are more expensive.
