Which one of the following is not a sea waves depositional landform?

Question

Accepted Answer

Wave-cut platforms are erosional landforms, not depositional. Here's why Option 4 is the correct answer and why the others are incorrect:

*   **Option 4: Wave-cut platform (Correct)** A wave-cut platform is formed by the erosive action of waves at the base of a cliff. The waves erode the cliff face, gradually undercutting it. Over time, this undercutting leads to the collapse of the cliff, and the process repeats, resulting in a flat or gently sloping platform at the base of the cliff. This platform is created by the *removal* of material, making it an erosional feature, not a depositional one.

*   **Option 1: Sabkha (Incorrect)** A sabkha is a coastal, supratidal mud flat or sand flat in which evaporite-saline minerals accumulate as the result of high evaporation. Sediments are deposited by sea waves and wind, and then the water evaporates, leaving behind salt deposits. This is a depositional environment.

*   **Option 2: Tombolo (Incorrect)** A tombolo is a depositional landform in which an island is attached to the mainland by a narrow piece of land such as a spit or bar. Tombolos are formed when wave refraction around an island causes sediment to accumulate in the sheltered area behind the island, connecting it to the mainland. This is a depositional feature.

*   **Option 3: Spit (Incorrect)** A spit is an extended ridge of sand or shingle projecting from the land into a body of water. Spits are formed by longshore drift, where sediment is transported along the coastline by waves and currents. When the coastline changes direction, the sediment continues to be deposited outwards, forming a spit. This is a depositional feature.