Which mechanism forms elevated cave entrances over time?

💡 Explanation

Entrances elevate via differential fluvial downcutting because surface streams erode valley floors faster than cave levels; therefore, entrances appear higher relative to current ground level rather than by tectonic uplift or other processes.

• Which physical characteristic primarily drives the downwelling of surface water within ocean gyres?
• Which displacement occurs to a high-altitude projectile launched eastward from a point at 30 degrees North latitude?
• Which process most directly forms narrow, steep-sided fjords along coastlines over geological timescales?
• Which phenomenon occurs when air masses move poleward along the Earth's surface due to pressure gradients?
• Which outcome occurs when intense wave action destabilizes beach sediments near a barrier island?
• Which process primarily drives the global thermohaline circulation when surface water temperature decreases near the poles?