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.

Clearly, a weak Eurozone has not been good news for the company and, with the Euro depreciating considerably as a result of a looser monetary policy being employed by the ECB, Synthomer's financial performance has been held back somewhat by currency headwinds.

Answer: currency