Final answer:
The major topographic features created by glacial erosion are U-shaped Valleys, Horns, Hanging Valleys, and Drumlins, each sculpted by the movement of ice and indicative of past glaciation.
Step-by-step explanation:
The major topographic features sculpted by glacial erosion are A) U-shaped Valleys, Horns, Hanging Valleys, and Drumlins. These forms result from the powerful erosive action of ice as it moves down mountainous terrains or across landscapes during the periods of glaciation. U-shaped Valleys are broad and often steep-walled valleys carved by the passage of a glacier, contrasting with the V-shaped valleys formed by rivers. Horns are sharp, pyramid-like peaks that form when several glaciers erode a mountain from different sides.
Hanging Valleys are formed when a smaller glacier flows into a larger one, the junction between the two often features a waterfall or steep drop. Lastly, Drumlins are elongated hills made of glacial till, their tapered shape indicating the direction of past glacial movement.