Which erosional process is accelerated when freeze-thaw cycles occur within a cirque formation?

💡 Explanation

When freeze-thaw cycles occur within a cirque, glacial plucking is accelerated because water expands upon freezing, pressurizing cracks in the bedrock, leading to removal of rock fragments and headwall steepening. Therefore plucking leads to headwall steepening , rather than nivation, abrasion or striation, which depend on other mechanisms.

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