Question

explain how sand dunes change as you move away from the sea. Include the words grey dune, yellow dune, fore dune.

Answer 1

As we move away from the sea, first we meet foredune that runs parallel to the shore, then yellow dune, and next grey dune.

Foredunes are made of wind-blown sand.

Yellow dunes are mostly covered with vegetation and have contain some soil.

Grey dunes are covered with vegetation, have a layer of lichen and soil on the top.