Valleys

-Valleys are formed by weathering and erosion by means of rivers or glaciers. The water moves through, carving a "V" shape into the land.
- valleys can be convenient to humans living in them because there is usually a water source running through the base of the valley, providing easy access to water for drinking, cooking, etc.
- a negative effect that valleys could have on people is that the steep sides of the valley may result in landslides, which destroy anything in their way.