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Which process forms a 'fjord'?
- River erosion
- Glacial erosion
- Wind erosion
- Coastal erosion
Answer: Glacial erosion
Fjords are deep, narrow inlets with steep sides formed by glacial erosion. When glaciers retreat, seawater floods the U-shaped valley. Fjords are common in Norway, Chile, and New Zealand. They are distinct from rias, which are drowned river valleys.