What types of landform are called a valley?

A valley is a type of landform. A valley is a lower part in the land, between two higher parts which might be hills or mountains. Valleys often start as a downward fold between two upward folds in the surface of the Earth, and sometimes as a rift valley.

Explanation:

Valleys are one of the most common landforms on the surface of the planet. There are three main types of valleys, the V-shaped valley, the flat floored valley and the U-shaped valley.