If the process illustrated in the diagram is interrupted by a chemical at point x, there would be an immediate effect on the release of
(1) chlorophyll
(2) nitrogen
(3) carbon dioxide
(4) oxygen

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.