Final answer:
The term used on an Italian wine label to indicate that the grapes were grown in the historic centre of the district is 'Classico'. This term is usually used for wines that come from traditional, well-established wine regions in Italy.
Step-by-step explanation:
The term used on an Italian wine label to indicate that the grapes were grown in the historic centre of the district is Classico.
When the label says 'Classico' it means that the grapes used to make the wine were grown in the original area of production. This term is usually used for wines that come from traditional, well-established wine regions in Italy.
For example, if you see 'Chianti Classico' on a bottle of wine, it means that the grapes used to make that wine were grown in the historic center of the Chianti district in Tuscany, Italy.