The answer is C.
It is not true that CO2 is released during photosynthesis, rather its the opposite. Carbon dioxide is a raw material for the production of starches and cellulose through photosynthesis. Atmospheric carbon dioxide is captured during the light dependent reactions of photosynthesis then used for the production of starch, glucose and cellulose in the light independent reactions (Calvin cycle) of photosynthesis.
In aerobic cellular respiration, oxygen rather than Carbon dioxide is a requirement because it is needed as the terminal electron acceptor in the production of ATP.
An antibiotic is a medicine, which is used to treat the infections caused by the bacteria. The antibiotics kill the bacteria generally by rupturing heir cell membrane or destroying their genetic materials, so that they cannot reproduce.
The structure of the bacteria and the viruses are completely different. Due to the difference in the structures of the bacteria and viruses, the antibiotics cannot work on viruses. So, the antibiotics are ineffective to cure the viral infections.
Answer:
Decomposers. I hope i am right