<span>because of the Germans' decision to resume the policy of unrestricted submarine warfare.
Hope this helps.</span>
Answer:
The total value of all final goods and services produced in a particular economy is called Gross Domestic Product (GDP).
Explanation:
In macroeconomics, the Gross Domestic Product (GDP) is a macroeconomic magnitude that expresses the monetary value of the production of goods and services of final demand of a country or region during a given period, normally a year.
Explanation:
some of the main regions are-
Caucasus
Ural
Siberia
Northern Europe
Far Eastern Federal District