Which risk increases when parabolic dunes migrate aggressively inland?

💡 Explanation

Agricultural land becomes buried as dunes advance via saltation; active dune migration covers fertile soil because wind action transport moves sand grains causing crop and range land degradation, therefore arable land is lost due to burial, rather than albedo or aquatic conditions.

• After a large volcanic eruption deposits thick tephra layers, which landform change mechanism accelerates?
• Which risk significantly increases where large-scale dam construction blocks sediment flow into a fjord?
• Which risk significantly increases when groundwater extraction exceeds recharge in karst cave systems?
• Which mechanism increases sediment deposition within an alluvial channel lacking vegetation?
• Which tectonic effect directly results when the horizontal shearing motion builds along a transform fault exceeding lithospheric strength?
• Which process primarily controls stratification within a deep meromictic lake?