Not enough information to answer. State in which country?
North Dakota and surrounding states
nevado , lake thao, rocky mountain
Many states in the U.S. have valleys, including California, known for the Central Valley; Colorado, with the San Luis Valley; and Virginia, which features the Shenandoah Valley. Other notable states with significant valleys include Washington, with the Yakima Valley, and Utah, home to the Salt Lake Valley. Each of these valleys is characterized by unique geographical features and ecosystems.
Geography dictated it - settlements in valleys divided by mountains and water grew larger into city-states.
The first Andean states emerged in the valleys on the western side of the mountains.
Delaware
There are many states where you would find valleys. Some of these have been covered at one time by glaciers and when the glaciers melted the left behind gigantic pieces of ice. As a glaciers melted sand and gravel and even large rocks formed around these pieces of ice. And when the ice melted the left valleys and often lakes. These areas are called Kettle-Moraine areas. You can find these in Minnesota and in Wisconsin. Very large and deep valleys can be found in areas where water has washed away and worn down areas. You will find these areas in Wyoming and Utah and places like that.
The plural form is valleys.
There are several types of valleys, including V-shaped valleys formed by erosion from rivers, U-shaped valleys carved by glaciers, rift valleys formed by tectonic activity, and hanging valleys created when smaller tributary valleys flow into larger main valleys.
Two geographic features of the West besides mountains and valleys are deserts and plains. Deserts like the Mojave and Sonoran cover large areas of the western United States, while plains such as the Great Plains stretch across states like Montana and Wyoming.
Examples of valleys can be found all over the world, ranging from the Grand Canyon in the United States to the Danube Valley in Europe to the Great Rift Valley in Africa. Valleys are formed by various geological processes such as erosion by rivers, glaciers, or tectonic activity, creating diverse landscapes and habitats.
There are plenty of valleys in Wales.V-shaped valleys are formed by water flow.U-shaped valleys are formed by glaciation.