A flat plain.
Convex (curves out), Concave (curves in) and plain (flat).
the reson crops grow better in plain reigons then mountains is because plain reigons have soil and more sunlight
a plain is a large flat land and a mountain is a giant weather rock.
Fancy, beautiful, or mountain can be an adjective for plain, depending on the meaning of plain.
A desert can include a plain, a mountain, plateaus, valleys - almost any landform imaginable.
The regions of Texas include: The Central Plain The Great Plain The Coastal Plain The Mountain and Basin Plain
plain
All; Mountain Plain, desert plain, and bay.
plain
a plain
Usually a valley or a plain.