Which consequence results when tectonic subsidence creates a depression in a river's floodplain?

💡 Explanation

When tectonic subsidence generates a depression in a floodplain, avulsion occurs because the river channel may divert and occupy the low-lying area, forming a new oxbow lake. Therefore, oxbow lake formation results, rather than glacial retreat, coastal erosion, or soil salinity changes, which involve entirely different mechanisms.

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