Final answer:
The jagged feature shaped by glaciers sculpting the rock on three or more sides is known as a horn. The correct option is b) horn.
Step-by-step explanation:
The jagged feature that is a result of glaciers sculpting the rock on three or more sides is known as a horn. Glacial horns are sharp peaks formed by the carving action of glaciers that erode the mountainsides around them. These processes occur once a mountain range is formed, with the mountains subjected to erosion by water and ice.
Unlike worlds without running water or ice, such as the Moon or Mercury, where mountains remain smooth, on Earth, glaciers powerfully sculpt the rock creating distinct and rugged landscapes. The sculpting action of glaciers can also result in other features such as cirques, which are bowl-shaped depressions, and arêtes, which are narrow ridges.