A.A group of islands having sea water all around.
B.Coral island or reef, usually an incomplete ring enclosing a lagoon
C.Lines connecting parts of the same altitude above the sea level
D.A chain of rocks lying at the sea
A.A group of islands having sea water all around.
B.Coral island or reef, usually an incomplete ring enclosing a lagoon
C.Lines connecting parts of the same altitude above the sea level
D.A chain of rocks lying at the sea