Which process primarily causes horizon mixing during pedogenesis?

💡 Explanation

Organism activity causes soil horizons to mix due to bioturbation: burrowing animals and plant roots physically redistribute soil. This process integrates materials across layers because faunal transport acts against gravitational sorting, rather than any purely chemical process influencing aggregation.

• Which outcome will accelerate when coastal vegetation fails to maintain cohesiveness during storm surges?
• Which outcome occurs when sediment supply overwhelms fluvial transport capacity at a mountain front?
• Which outcome follows a limestone cave ceiling collapse?
• Which outcome occurs during sediment starvation within a littoral cell?
• Which consequence results when heavy tephra accumulation destabilizes slopes?
• Which phenomenon accelerates when permafrost thaws beneath an Arctic roadbed?