How do icebergs form? they form when seawater freezes. they form when groundwater freezes. they break off from the coast of iceland. they break off large ice sheets found at the poles.

Answer is D. They break of the ice sheets at the poles.

The correct answer is option D

Explanation:

An iceberg is formed by the broken part of a large glacier or pole ice that floats into the sea. The ice berg is made up of fresh water as the glaciers or ice on the pole is made up of fresh water. The freshwater is less denser than the saline water of the sea, thus ice berg float in the sea.

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