What are the three most common types of landforms in Washington what bodies of water or also considered and landforms?

The three most common types of landforms in Washington are mountains, valleys, and plateaus. The Cascade Range and the Olympic Mountains dominate the landscape, while the Columbia River Gorge and Willamette Valley provide significant valley formations. In addition to these landforms, bodies of water such as the Puget Sound, Lake Washington, and the Columbia River are also considered significant landforms due to their geographical and ecological roles.