Answer:
Salt in the ocean comes from two sources: runoff from the land and openings in the seafloor. Rocks on land are the major source of salts dissolved in seawater. Rainwater that falls on land is slightly acidic, so it erodes rocks.
I'm not sure if this is correct but,
I'm quite sure it's from the minerals in the water and it could come from the marine animals that live in the ocean. It could also come from the sand.
