There are many things which cause erosion, and far more which don't. Compare your question to: "How many animals on earth are not chickens?". I can speculate as to what you mean, and provide a...
Main causes are water and the wind.
wind, air, and ice cause erosion.
The movement of material by wind, water, ice, and gravity causes erosion, although mankind is increasingly assisting in that movement.
it break the beauty of the beach