It is called being submerged.
An area of land completely surrounded by water is called an island.
They are called islands
Only time can tell. But it is said that Venice will completely disappear in 2070.... :(
No, you do not have to, unless it"s an aquarium plant, then yes.
A lake.
Under water bombs are called naval mines. Under water bombs are used to destroy surface ships or submarines.
A body of water almost completely surrounded by water is called an ocean. Oceans will often run into each other.
It is an island.
A lake?
This could be a number of things. A pond, a lake, an inland sea, etc.
To immerse in water means to completely submerge something in water or to surround it with water. It can also refer to the act of involving oneself fully in an experience or activity.
water