The correct option is A-4, B-1, C-2, D-3
Explanation
Geomorphic agents such as running water, wind, glaciers, and waves shape the Earth's surface through processes of erosion, transportation, and deposition. Each agent creates distinct landforms characteristic of its specific environment and mechanism of action.- A. River - Levee (4): Levees are natural embankments found along the banks of large rivers. They are depositional landforms formed when a river overflows its banks during floods. As the water spreads out, its velocity decreases, causing coarse sediments to deposit immediately next to the channel, building up ridges.
- B. Wind - Sand Dune (1): Sand dunes are mounds or ridges of sand formed by wind action, primarily in hot deserts or coastal regions. They are depositional landforms resulting from the accumulation of sand grains transported by aeolian processes when the wind encounters an obstruction.
- C. Glacier - Moraine (2): Moraines are accumulations of unstratified debris (glacial till) consisting of rocks and soil. They are depositional landforms created by the movement of glaciers, which transport and deposit material at their sides (lateral moraines) or terminus (terminal moraines).
- D. Sea Waves - Stack (3): A stack is an isolated, vertical column of rock standing in the sea near a coast. It is an erosional landform formed by the relentless action of sea waves on a headland. The progression typically follows: Crack → Cave → Arch → Stack (after the arch roof collapses).
Key Takeaway: Rivers create Levees through flood deposition; Winds create Sand Dunes through aeolian deposition; Glaciers create Moraines through debris accumulation; and Sea Waves create Stacks through coastal erosion.