Which of the following describes a process of weathering in cold environments?
The breakdown of rock in a hollow under a snow patch as a result of frost action.
2 )
The breakdown of rock under a glacier by the action of sub-glacial meltwater.
3 )
The downhill movement of debris in cold environments under the influence of gravity.
4 )
The removal of rock from the land surface by glacial ice freezing to it and moving away.
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