Which geophysical event is most likely to occur along coastlines as permafrost thaws due to rising global temperatures?

💡 Explanation

When permafrost thaws significantly, the mechanical strength of the frozen ground decreases as ice within the sediment melts; this reduction in cohesion leads to increased coastal erosional processes. Therefore, accelerated coastal erosion results, rather than tsunami reduction, mangrove expansion or dune stabilization, which depend on different environmental drivers.

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