Final answer:
Landscape Arch, the longest natural arch in Arches National Park, was produced by erosion, a process that includes the physical and chemical breakdown of materials affected by elements like water and wind.
Step-by-step explanation:
At 88 meters (289 feet), Landscape Arch in Arches National Park in Utah is believed to be the longest natural arch in the world. This incredible geologic feature was formed by the process of erosion. Erosion is the gradual wearing away of rock or soil by physical breakdown, chemical dissolution, and transportation of material, caused by water, wind, ice, or gravity.
Much like the Grand Canyon, which showcases a remarkable display of arid-land erosion, Landscape Arch is a product of similar geologic processes. These processes include the erosion of tributaries and slopes, as well as active tectonics that have shaped the region over millions of years, carving and whittling away at the rock formations to create the unique archways seen today.