What is the relationship between eurozone and euro in the context of the input sentence. Choose an answer from: 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.

BRUSSELS: Greece on Sunday faced a final EU summit to clinch a deal that would stop Athens crashing out of the euro after divided eurozone ministers halted "very difficult" talks on a new bailout overnight.

Answer: currency