Question

Explain briefly about sand dunes?​

Answer 1

Answer :

A sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by tides. ... Without vegetation, wind and waves regularly change the form and location of dunes. Dunes are not permanent structures. Sand dunes provide sand storage and supply for adjacent beaches.

Answer 2

• A sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by tides. ... Without vegetation, wind and waves regularly change the form and location of dunes. Dunes are not permanent structures.

• Sand dunes provide sand storage and supply for adjacent beaches. They also protect inland areas  from storm surges, hurricanes, flood-water, and wind and wave action that can damage property.

• Sand dunes support an array of organisms by providing nesting habitat for coastal bird species  including migratory birds. Sand dunes are also habitat for coastal plants.
• The Sea brook dunes are  home to 141 species of plants, including nine rare, threatened and endangered species.

• Construction of beachfront homes and hotels can encroach on sand dune habitat.
• Increased  tourism, foot traffic, and removal of plant species can cause severe erosion.
• Beach litter is  aesthetically unpleasing, and can be harmful to shorebirds and other animals.  

hope this answer was helpful :)