Which geographic feature is partially surrounded by land and opens to the sea?

• A. A desert basin
• B. A river mouth
• C. A large freshwater lake
• D. A body of water that is partially surrounded by land

Answer: (D)

This question tests recognizing bays—the coastal water body that is partly enclosed by land but opens to the sea. A bay forms when the coastline curves inward, leaving a water area that is protected on several sides yet connected to the ocean. That description matches the choice describing a body of water that is partially surrounded by land, since such a water body is exactly a bay in geographic terms. The other options don’t fit: a desert basin is inland and not connected to the sea, a river mouth is where a river meets the sea rather than a water body partially enclosed by land, and a large freshwater lake is typically inland and not open to the sea.