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Marine snow is pieces of organic matter that were once part of living organisms (option a).
What is marine snow?
Marine snow can be defined as a cumulus of organic (from living organism) matter in the ocean.
- These cumuli of organic matter are composed of energy-rich organic detritus.
- Marine snow is a rich energy source for living things (animals) found in the deep waters of the ocean.
In conclusion, marine snow is pieces of organic matter that were once part of living organisms (option a).
Learn more in:
https://brainly.com/question/2080560