sea level changes - united states. for those areas with the largest change in sea level (red), why do you think sea level increases are so high? a. a crustal gravity anomaly there creates a larger pull on the water, causing it to flow here b. meltwater from nearby glaciers and ice sheets contributes to sea level rise c. this area is a delta with sediment that compacts over time, causing the elevation of the land to subside in addition to the rise in sea level