Question

What is a sand dune and how it protects the coast?

Answer 1

*it is nothing but a great lump of sand particles
got gathered at a particular or a region of the desert areas....
* it resists the dry wind in the desert before reaching the coasts....

Answer 2

• When wind blouse, it lifts and transports and from one place to another. when it stops blowing the sand Falls and gets deposited in low Hill like structures. these are called sand dunes.