It is called aeolian erosion
By wind, mainly.
Wind.
Wind
wind
Wind
Sand dunes are formed by wind, which is one kind of erosion.
Sand dunes are formed by wind, which is one kind of erosion.
Wind is the erosional force that forms sand dunes.
The force of winds shapes sand dunes.
wind
Sand dunes are not formed by the process of erosion, they are formed by the process of aeolian deposition.
Sand dunes are formed when sand is pushed by the wind into a very, very small mound.
Sand dunes.
Sand dunes are formed by the wind.
they are formed when wind lifts up dry sediments and accumulate over time Sand dunes are big piles of sand washed up from the beach
A sand dune is a Constructive force.