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THE ANSWER IS B. CYANOBACTERIA

Answer: The correct answer is- b) Cyanobacteria ( also known as blue green algae).

Cyanobacteria ( blue green algae) are the aquatic, photosynthetic bacteria that utilize carbon dioxide and water in the presence of sunlight to produce  food ( glucose) and release oxygen in the environment.

This process is known as photosynthesis.

They use a light harvesting green colored pigment called chlorophyll- a, which is present in them.

Thus, scientist use cyanobacteria to eat carbon dioxide.

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