2. wave refraction causes the wave to be concentrated in particular areas and less intense in others.
3.
4. headlands. they are shaped by hydraulic action, corrasion and corrosion
5. Hydraulic action - waves enter the cracks in the rocks and air is compressed into the cracks by the force of the wave. as the air is compressed it acts to erode rock.
Corrasion - the wave action moves rock and other material across the rock shelf and wear away the rock in an abrasive fashion
Corrosion - when waves break they wet the rocks, as the rock dries the salt in the sea water crystallises and acts on the minerals in the rock to erode material
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