B. Krill
I hope this will help you that is the correct answer
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Pretty sure the answer is oxygen, as it is produced in photosynthesis and consumed in respiration.
Answer:
Explanation:
Unicellular or multicellular, most cyanobacteria are a characteristic blue green, but can also be green, brown, yellow, black, or red.
Th polluting oh the ocean is a big concern for people because the animals the some people depend on for food are being killed.
