Answer: Valley
Explanation: Valleys are among the most common features in the world. They are a stretch of land that lies between hills and normally has a river running through it. In addition, valleys are typically formed by erosion which is the gradual breakdown of materials.
They tried to settle and agree and think through there problems
France, England, Spain and either Sweden or Netherlands. Both did so either is ok.
Put simply, the difference between a unitary and a federal government is that a unitary government puts its power in one central government while in a federal system the governing power is divided into federal and local governing bodies that connect to the national government.