Hydraulic action is the force of waves compressing air in cracks of cliffs.
Swash is the movement of waves __________________________________ .
onto the beach.
back into the sea.
Gabion cages are ❌ cages filled with large rocks and ❌. The waves hit the cage and the rock soaks up the energy which results in ❌ erosion.
Offshore breakwater - a large rock built as a barrier ___________________, to make the waves break.
out at sea
near the coast
on the beach
