Collision of macromolecules in surface water produced particles that sink to the bottom, know . marine snowb. macroalgaec. nektond. marine debris

It is called Marine snow.

Explanation:

Marine snow is the particulate matter that originate from the ocean. It is formed by collisions and combinations larger molecules(macromolecules) on surface water which later settles at the bottom. Marine snow may also be formed from decaying organic materials such a salp calony and house of a larvacean. Marine snow contains larger molecules of microorganism and protistans.

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