That would just be called Weathering and Erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. Mechanical weathering physically breaks up rock. One example is called frost action or frost shattering. Water gets into cracks and joints in bedrock.
X has an elevation of 1600m
Y has an elevation of 1240m
Difference between the two elevations: 1600-1240=360m
Answer:
Highest
Arrow = from outer edge to center
Second Highest
Arrow = second closest ring to the outer edge to center
Third Highest
Arrow = middle circle to center
Lowest
Arrow = outer edge to middle circle
