Question

what are sand dunes?

Answer 1

Hey mate, here is your answer.: -)

A sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by tides. ...

HOPE it helps to you!!!

Answer 2

• A sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by tides. They are formed over many years when windblown sand is trapped by beach grass or other stationary objects.