i think water erosion created norways fjords
wind
wind is an agent of erosion which causes sheet erosion
Wind is the erosional force that forms sand dunes.
Gravity mostly
Wind
The force of winds shapes sand dunes.
These are the electrostatic forces.
a positive ion is attracted to a negative ion
gravity
Gravity doesn't just "affect" the formation of stars; it's just about the only force that CAUSES the stars to form in the first place.
Sand dunes are formed by wind, which is one kind of erosion.
It is called aeolian erosion