SAND PARTICLES brought by wind is called 'Loess'.The plains made by the 'Loess' are very fertile for cultivation.Sea cave:A sea cave, also known as a littoral cave.It is a type of cave formed primarily by the wave action of the sea. The PRIMARY process involved is erosion. Levee: An embankment or a dam is a mound made of a mixture of concrete, clay, and PEBBLES, etc. It is called levees.