B) respiration uses O2, but fermentation does not
C) respiration uses glucose, but fermentation does not
D) respiration stores energy in the form of starch or glycogen, but fermentation does not
The correct answer here is B. Let's look at each choice in turn.
A is incorrect. A full cycle of cellular respiration complete with oxidative phosphorylation produces over 30 ATP. Fermentation produces much less per cycle.
B is correct. Respiration uses oxygen (O2) as the ultimate electron receptor to produce water (H2O). Fermentation does not utilize oxygen. Instead, carbon dioxide (CO2) is produced as an off gas.
C is incorrect. Both processes use glucose as the starting point for energy production.
D is incorrect. Both processes store energy formed in the form of ATP which is not a type of starch.