A narrow waterway that connects the open sea with a coastal lagoon, often between barrier islands, is called an what?

• A. Lagoon
• B. Moraine
• C. Inlet
• D. Longshore Bar

Answer: (C)

An inlet is the narrow waterway that connects the open sea with a coastal lagoon, often sitting between barrier islands. It acts as the tidal passage that allows seawater to flow into and out of the lagoon, creating exchange between the two environments. The lagoon is the sheltered, shallow water behind the barrier, while the channel itself is the conduit linking it to the sea. A moraine is a glacial debris feature, not part of this coastal system. A longshore bar is a sandbar formed by alongshore sediment transport and can influence openings but is not the waterway itself. A lagoon is the body of water behind the barrier, not the connecting channel. So the best term for the connecting passage is inlet.