A valley is a low area of land between mountains or hills,commonly with water flowing through the bottom,and a plain is an wide expanse of flat land.
Answer:
In a valley, a plain is enclosed on two sides, but in other cases a plain may be delineated by a complete or partial ring of hills, by mountains, or by cliffs. Where a geological region contains more than one plain, they may be connected by a pass (sometimes termed a gap).
Explanation:
