Sea arches are the landform that is evidence of erosion by waves on rocky coasts.
The process of wearing rocks down into smaller pieces and then taking them away is called weathering. Weathering refers to the various mechanical, chemical, and biological processes that break down rocks into smaller fragments. It can occur through processes like freeze-thaw cycles, abrasion by wind or water, and the action of plant roots. Once the rocks are broken down, they can be carried away by erosion, which involves the movement of weathered material by wind, water, or ice. So, while erosion is closely related to weathering, it specifically refers to the transportation of the weathered rock particles. Therefore, the correct answer to your question is weathering.
