Which process triggers widespread lacustrine landslides when glacial meltwater rapidly fills a proglacial lake?

💡 Explanation

When meltwater fills a proglacial lake, permafrost thaw occurs because the increased water volume and temperature destabilize the frozen ground around the lake, leading to landslides. Therefore reduced slope stability causes widespread landslides, rather than isostatic rebound, seismic activity, or eutrophication, which require significantly different conditions.

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