Answer: Producer organisms use minerals in the water to make food through chemosynthesis.
Step-by-step explanation:
The producer organisms that exist around these underwater vents are able to produce food through an alternative process to photosynthesis known as Chemosynthesis.
With Chemosynthesis, producer organisms use the minerals in the water from black smokers by converting molecules that contain carbon to organic matter by using energy they acquired from oxidizing ferrous ions and other inorganic compounds.