Answer: It's important to note that ice sheets (a) are massive continental glaciers that cover extensive areas, such as Antarctica and Greenland. Ice caps (b) are smaller ice masses that are similar to ice sheets but cover less area. Piedmont glaciers (d) are formed when alpine glaciers flow out and spread into broader, flatter areas at the base of mountains.
Step-by-step explanation:
The correct answer is c. alpine glaciers.
Alpine glaciers, also known as valley glaciers, are elongated glaciers that are confined within bedrock valleys. These glaciers form in mountainous regions where the terrain allows for the accumulation and flow of snow and ice. As the ice mass builds up, it flows down the valley, following the path of least resistance. The shape of the glacier is determined by the topography of the valley, with the ice typically being narrower and longer compared to other types of glaciers.
Alpine glaciers can be found in various mountain ranges around the world, such as the Alps, Himalayas, Andes, and Rocky Mountains. They play a significant role in shaping the landscape by eroding and carving out U-shaped valleys, cirques, and other distinctive landforms.