Which outcome occurs when rapid tectonic uplift causes an alluvial river to downcut significantly?

💡 Explanation

When rapid tectonic uplift occurs, stream power increases, leading to increased vertical erosion because the river's base level is lowered substantially, enabling it to cut down into the bedrock and form incised meanders. Therefore, incised meanders form, rather than floodplain broadening, higher sinuosity, or braided channels, which require different base-level changes.

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