Which Galician estuary system, a series of flooded river valleys called rias, is famous for its mussel farming platforms and seafood production?

• A Rias Baixas ✓
• B Rias Altas
• C Costa da Morte
• D Costa del Sol

The Rias Baixas in southern Galicia are deep coastal inlets where bateas (wooden rafts) cultivate mussels in some of the world's richest seafood waters.