Utilize the input text as a context reference, choose the right relationship between eurozone and euro from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

If, under the worse-case scenario, Greece were to lose the support of the European Union and European Central Bank, default on more of its debts and gradually slide out of the eurozone , the country may have to drop the euro as it is currently used in favour of Greek euros, or reintroduce the "drachma", calling it "new drachma".

Answer: currency