Answer:
(d) - Chemoautotroph
Explanation:
Chemoautotrophs -
Autotrophs are the organism , that can prepare food by their own .
And ,
Chemoautotrophs are the organisms , that uses , inorganic molecules like carbon as their source , to generate energy via oxidizing the inorganic molecules .
The inorganic source of energy can be , ammonia , hydrogen , hydrogen sulfide .
Hence ,
The correct term for the given statement is (d) - Chemoautotroph .