A valley is formed by a river flowing.
Examples are napa valley and sonoma valley.
Napa and sonoma were formed by a river flowing.
what were formed by a river flowing?
(a) Statue of Liberty
(b) body water
(c) swamp vegetation
(d) Rockies
(e) Napa and Sonoma
(f) clouds
(g) Sediment
(h) Calcium carbonate