Answer:
Kreb's cycle
Step-by-step explanation:
As depicted in the image of this question, aerobic cellular respiration is made up of three stages namely; glycolysis, Krebs cycle and electron transport chain (ETC). Glycolysis is the first to occur in the cytoplasm of the cell, after which it is followed by Krebs cycle, which uses the products of glycolysis as a starting material.
At the end of Krebs cycle, 2 molecules of carbon dioxide (CO2) are released as waste products. This release of CO2 occurs specifically at stage 3 and 4 of the citric acid cycle or Krebs cycle.