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.

Growth of retail sales in the Euro Area accelerated at the start of the third quarter, reflecting upturns in each of the bloc’s big-three nations, latest Eurozone Retail PMI (purchasing managers' index) data showed.

Answer: currency