Which is characterized by long lines of mountains separated by areas of rich farmland?

This area is known as a valley. It is a low area between hills or mountains. It often has a river running through it. The shape of the valley will depend on the characteristics of the stream of water flowing through it. Because of the existence of the river, it is possible to have areas of farmland in the sites next to the river. This makes valleys and ideal place for the agricultural industry.