Which phenomenon accelerates dune migration during prolonged droughts?

💡 Explanation

Drought causes vegetation to decrease; this results in a reduced vegetative anchoring effect, increasing sand availability. Therefore, dune migration accelerates, rather than other processes like chemical weathering or bioturbation playing significant roles under low moisture conditions because vegetation plays a key role.

• Which consequence results when excessive floodplain construction reduces alluvial storage?
• Which outcome occurs when sediment load overwhelms alluvial river competence?
• Which consequence results when excessive rainfall occurs in soils lacking sufficient clay content?
• Which outcome results when levee erosion in an alluvial plain?
• Which outcome occurs during ENSO when normal trade winds weaken?
• Which risk increases when carbonic acid saturates a cave?