Answer :
a. a region that has a common currency describes the euro zone.
A currency is a standardization of money in any form, in use or movement as a medium of alternate, for example banknotes and cash. A more general definition is that a foreign money is a machine of cash in not unusual use within a selected environment through the years, specially for people in a state state. forex is a medium of exchange for goods and offerings. In brief, it's money, inside the shape of paper and cash, usually issued by means of a central authority and generally prevalent at its face value as a technique of fee.
Currency may be decided in two most important ways: a floating price or a hard and fast rate. A floating fee is determined by the open market through supply and demand on international forex markets. therefore, if the demand for the foreign money is high, the fee will boom.
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