Which process dominates after floating buoyant plastic debris converges inside an ocean gyre?

💡 Explanation

When plastic debris accumulates in an ocean gyre center, photodegradation occurs because UV radiation breaks down plastic polymers, embrittling the plastics. Therefore photochemical degradation results, rather than sinking, biodegradation, or subduction, which require different accumulation mechanisms and environmental conditions such as high pressure.

• Which outcome occurs when hydraulic action erodes steep sea stack faces?
• Which risk increases adjacent to a river reach where artificial levees have been recently constructed?
• Which phenomenon shapes lake basins fed by glacial meltwater in previously glaciated landscapes?
• Which effect results from crustal dilation near fault lines?
• Which outcome occurs when a barrier island migrates landward?
• Which outcome commonly occurs when fault creep is persistently interrupted?