Discussion
Primary Producers fall in two categories e.g.
Answer: D
They are phototrophs and chemotrophs.
Both make their own food, differing only in the energy source: phototrophs such as green plants and cyanobacteria use sunlight, while chemotrophs such as the nitrifying and sulphur bacteria use energy released by oxidising inorganic compounds - which is how life persists in deep-sea vents where no light reaches.
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