Final answer:
The newly discovered organism is most likely a chemolithoautotroph, as it uses sulfide for respiration and carbon dioxide as a source of carbon.
Step-by-step explanation:
The newly discovered organism that uses sulfide (S²⁻) for aerobic respiration and carbon dioxide (CO₂) from the air as a source of carbon is most likely a c. chemolithoautotroph. Chemoautotrophs are organisms that use chemical energy from inorganic compounds as their energy source and carbon dioxide as their carbon source. They do not rely on sunlight for energy.