Answer:
Wave-cut cliff, sea arch, sea stacks
Explanation:
The effect of a wave erosion is made obvious by the structures formed by the wave action.
The high areas of land adjacent to the incoming wave develop the early features or the formation of wave action, which includes the <em>wave-cut cliff</em>
The continuous undercutting of the cliff by the wave results in the formation of the <em>wave cut platform</em>
The effect of the wave further on a cliff, results in the formation of a sea arch and finally a <em>sea stack</em>
Therefore, the correct sequence is the wave-cut cliff, sea arch, sea stacks
