A delta is formed as a river slowly washes natural erosion from the mountains and hills down to the sea.
(A delta; is formed; T:as a river slowly washes natural erosion from the mountains and hills down to the sea) (a river; slowly washes down; natural erosion; from the mountains and hills)
A delta a river
is formed slowly washes down
T:as a river slowly washes natural erosion from the mountains and hills down to the sea
natural erosion from the mountains and hills