Final answer:
V-shaped valleys are formed through downcutting and slope retreat. The processes of tearing down mountains, especially by ice, sculpt the rocks into sharp peaks and serrated edges.
Correct answer is B
Step-by-step explanation:
V-shaped valleys are formed through B. downcutting and slope retreat.
Once a mountain range is formed, its rocks are subject to erosion by water and ice.
The processes of tearing down mountains, especially by ice, sculpt the rocks into sharp peaks and serrated edges. In the absence of moving ice or running water, mountains remain smooth and dull.
Correct answer is B