Which of the following describes a process of sub-aerial weathering in coastal environments?
The breakdown of rock on an exposed cliff face due to the action of repeated changes in temperature.
2 )
The downhill movement of material at the coast under the influence of gravity.
3 )
The removal of rock from cliff tops by flowing water as it runs off the land into the sea.
4 )
The weakening of rocks at the base of a cliff by repeated pounding by waves at high tide.
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