Which process determines natural eutrophication in lake ecosystems within flat floodplains?

💡 Explanation

When rivers regularly flood, alluvial deposition occurs because sediment is transferred into the lake during flooding, building up organic matter and nutrient concentrations. Therefore, increased nutrient load results, driving eutrophication, unlike option A, causing opposite impact. Neither option C nor D explains eutrophication, they detail conditions needed for other geographic processes.

• Which mechanism primarily causes lobate terraces to form in high-latitude, gently sloping terrains during solifluction?
• Which mechanism triggers mudflow surge on an alluvial fan after intense rainfall?
• Which crustal deformation mechanism generates strike-slip faults along a transform boundary edge?
• At Earth's equator, which effect enhances tropical cyclone formation?
• Which landscape change accelerates when bioturbation diminishes in tundra?
• Which consequence results when tectonic subsidence creates a depression in a river's floodplain?