Question

Why sea water is salty?
As we all know that almost all rivers finally flow into the sea, so when the minerals salts from the Earth surface are dissolved by the river water, they carry it to the seas and make them unfit for drinking and also for other activities. Hence, sea water is salty.​

Answer 1

Answer:

Salt comes up from below, too

These vents contribute dissolved minerals to the oceans, which is one reason the oceans are salty. Rivers and surface runoff are not the only source of dissolved salts. ... A final process that provides salts to the oceans is submarine volcanism, the eruption of volcanoes under water.

Explanation: