Which term describes the rapid, high-energy impact waves have on shore organisms?

• A. Wave Run-up
• B. Tidal Range
• C. Wave Shock
• D. Littoral Drift

Answer: (C)

The main idea here is the immediate, high-energy force that breaking waves exert on organisms living along the shore. That rapid impact is best described as wave shock. When a wave breaks, it shoots a surge of water and air at high speed, delivering a sudden load that organisms must resist or suffer damage, dislodgement, or desiccation stress.

Wave run-up refers to how far the water climbs up the shore after a wave breaks, not the instantaneous force itself. Tidal range is about the difference between high and low tides over a tidal cycle, and littoral drift is the alongshore transport of sediment due to longshore currents. These describe other coastal processes, not the sudden impact on shore organisms.