The correct answer is A. structural landforms.
Structural landforms are landforms that are created by massive earth movements due to plate tectonics. These landforms can be mountains, valleys, plateaus, and rift valleys.
Weathering landforms are landforms that are created by the process of weathering. Weathering is the process of breaking down rocks and other materials by the action of wind, water, ice, and other natural forces.
Erosional landforms are landforms that are created by the process of erosion. Erosion is the process of moving soil and rock from one place to another by the action of wind, water, ice, and other natural forces.
Depositional landforms are landforms that are created by the process of deposition. Deposition is the process of laying down soil and rock in one place by the action of wind, water, ice, and other natural forces.