The correct answer is- C) anaerobic chemoheterotroph
Explanation:
Chemoheterotrophs are the organisms that consume carbon compounds like carbohydrates, lipids, etc which are already synthesized by other organisms. Anaerobes are the organisms that live in an oxygen-deficient environment.
The human intestine is that part of the human body which is anaerobic in nature therefore in human intestine lots of anaerobic bacteria are present.
So as the hypothetical bacterium is present in the human intestine which has the anaerobic condition and derive nutrition from host intestinal contents therefore this bacteria must be an anaerobic chemoheterotroph.
