Answer:
External/ internal migration.
True. A theory arises from certain phenomena or scenarios out of observation in an effort to explain why they occur, though they are yet to be proven.
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.
1. Crust
2. Mantle
3. Inner core
4. Outer core
Consumer Spending is the answer !
