The sea is large part of water.
It is eye of hot lavas too.
In water we find fire or minerals.
So water is fire too.
Sea is with enough water.
It changes the earth.
It changes its place by replacement of its place.
So we find the human civilization under its depth.
Its waves take the human settlement .
After many years when it is replaced we see the fossils of human and human civilizations.
Sea is moving to and fro.
It is amazing source of earth.