Answer:
D. Rivers and Glaciers
Explanation:
A fjord is formed when a glacier retreats, after carving a U-shaped valley, and the sea fills the resulting valley floor. This forms a narrow, steep sided inlet connected to the sea. The terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.
