What term describes the wearing away of coastlines by waves, currents, and weathering?

• A. Erosion
• B. Fjord
• C. Eustatic Change
• D. Drumlin

Answer: (A)

Wearing away of coastlines by the action of waves, currents and weathering is erosion. Waves deliver energy that breaks rocks and moves sediment (through hydraulic action, abrasion, solution, and attrition), while currents transport material and weathering weakens exposed rock. Over time, this erodes cliffs and beaches, reshaping coastlines. The other terms describe different features or processes: a fjord is a glacially carved valley filled with seawater, eustatic change is global sea-level change, and a drumlin is a glacially formed elongated hill. So erosion is the correct description of the process.