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.

Cutting the ECB's lifeline to Greek banks would push the country out of the eurozone and recklessly endanger the reputation of the ECB and the euro itself, argues Matthias Kroll.

Answer: currency