A sandbar is formed by 
loose soil magma eruptions wind currents near the shoreline seismic activity natural erosion flooding Physical weathering
A B C D E F G H
Some sediment comes from natural erosion.
a sandbar is formed by natural erosion.
A sandbar is formed by  (A) loose soil (B) magma eruptions (C) wind currents (D) near the shoreline (E) seismic activity (F) natural erosion (G) flooding (H) Physical weathering