Question

the cellular respiration process that requires the presence of oxygen is
glycolysis.
the electron transport chain.
the citric acid cycle.

Explanation:

Glycolysis can occur in both aerobic and anaerobic conditions. The citric - acid cycle and the electron - transport chain are parts of aerobic cellular respiration. Oxygen is the final electron acceptor in the electron - transport chain. Without oxygen, the electron - transport chain cannot function properly.

Answer:

B. the electron transport chain