Which outcome results when high Arctic building foundations thaw?

💡 Explanation

Thermokarst development causes structural collapse because thawing permafrost weakens the ground, with Ice Wedge Thaw being the central mechanism creating unstable cavities. This leads to subsidence, therefore option A is correct rather than options that describe stabilizing or cooling effects under different conditions.

• Which mechanism primarily contributes to increased sedimentation rates when straightening a meandering river nearing oxbow stage?
• On Arctic slopes, which outcome is exacerbated when soil cryoturbation disrupts the vegetation?
• Which outcome accelerates the collapse of coastal sea stacks along rocky shorelines?
• Which erosional outcome significantly reduces mangrove forest extent?
• Which risk increases when accelerating thaw of sub-sea permafrost releases methane hydrates?
• Which weathering cause accelerates the erosion of coastal sea stacks formed from sedimentary rock?