Final answer:
Polymetallic nodules are a source of minerals that do not damage the sea floor.
Step-by-step explanation:
Polymetallic nodules are a source of minerals that does not damage the sea floor. These nodules are small rock-like formations that contain high concentrations of valuable minerals such as manganese, nickel, and cobalt. They are found on the seabed in deep waters and can be harvested without causing significant harm to the marine ecosystem.
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