Pond organisms live in shallow water so they can produce
Marble is formed from limestone and contains tiny interlocking grains.
Your answer is C.
Identical twins could not be considered as clones for they are different individuals which came from the same egg and sperm. Clones are produced asexually, a copy of another organism. Even though identical twins share the same DNA, they have different qualities as of the other twin which makes them their own unique self.