What are caused by the waves of the sea ?

The wind The most common cause of surface ocean waves is air movement (the wind). Waves within the ocean can also be caused by tides, interactions between waves, submatine earthquakes or volcanic activity, and atmospheric disturbances (storms). Wave size depends on wind speed, wind duration, and the distance of water over which the wind blows. The longer the distance the wind travels over water, or the harder it blows, the higher the waves. As the wind blows over the water, it tries to drag the surface of the water with it. The surface water cannot move as fast as air, so the water rises. After it rises, the water is pulled back down by gravity. The falling water's momentum is carried below the surface, and water pressure from below pushes this swell back up again. This tug of war between gravity and water pressure creates wave motion

And in some case, with really big waves, they're caused by earth-quakes or earth-slides, both above the water and underwater earth slides.

hi alberello the phases of the moon do pull the tides in and out and the waves come with the mo ving of the tides. More I cannot give you without looking it up in my old college physics and other scientific studies.winds cause ruffling of the water but the pull of the tides causes the waves among other things.I am not a scientist at all but a non published fiction writer.good discussion as it makes us use our little grey cells as Hercule Poriot would have said in Agatha Christie's books. lol

the sun i think have a very little contribution too for the cause of sea waves although overriding by the other external forces, the greater forces wins...