Question

which kind of bacterium can get nutrients from its food with or without using oxygen? photosynthetic bacteria obligate aerobes facultative anaerobes

Explanation:

Photosynthetic bacteria use light for energy - not related to oxygen - use for nutrient - extraction. Obligate aerobes require oxygen to get nutrients from food. Facultative anaerobes can use oxygen when available but can also perform anaerobic respiration to get nutrients without oxygen.

Answer:

C. facultative anaerobes