Answer:
A)Glycolysis is one method that cells use to produce energy.
B)a sequence of reactions in the living organism in which oxidation of acetic acid or acetyl equivalent provides energy for storage in phosphate bonds called also citric acid cycle, tricarboxylic acid cycle.
C)electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation.