How is salt formed in the sea?

When Rhine falls on the ground and seepz below it, it washes away substances from the soil and rocks. it carries these substance into the river and the sea .you can read the names of these substances on the label of a bottle of mineral water .River water contains only a little salt-about 1g/l,whereas the salt 🧂content of the sea is much higher-about 35g/l,on an average. The reason is that the salt remains in the sea Although the rivers continue to deposit new salt s,the seas do not become 'over salty 'because animals and plants in the sea obsorb the salt in their bodies. When they die, they sink to the seabed and decompose in to sediments.