Bacteria that live around deep-sea, hot-water vents obtain energy by oxidizing inorganic hydrogen sulfide belched out by the vents. they use this energy to build organic molecules from carbon obtained from the carbon dioxide in seawater. these bacteria are
a. chemoheterotrophs
b. photoheterotrophs
c. chemoautotrophs
d. photoautotrophs

Chemoautotrophs.

Explanation:

Autotrophs may be defined as the organism that can prepare their own food with the help of chemical and light. Two types of autotrophs are chemoautotroph and photoautotrophs.

Chemoautotrophs are the organisms that can prepare their own food with the help of chemicals. The bacteria living around deep sea and hot water vents are considered as chemoautotrophs because they prepare their food with the help of carbon present in their surroundings.

Thus, the correct answer is option (A).

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