Answer: Electron transport.
Explanation: The cellular respiration takes through three important steps:
Glycolysis
Kreb's Cycle
Electron transport chain.
The process of cellular respiration can be defined as the process by which the glucose is broken down into high energy molecules which is used by the cells to perform metabolic activities.
In Glycolysis the glucose is broken down into pyruvate which combines which acetyl co A to enter in the Kreb's cycle which ends with the production of ATP moles at the last stage of cellular respiration, ETC.