During intense exercise, there may not be enough oxygen available to complete the process, so a substance called lactate is made. Your body can convert this lactate to energy without using oxygen. But this lactate or lactic acid can build up in your bloodstream faster than you can burn it.
hope this helps :)
(if you wouldn’t mind can you mark me brainliest?)
I don't really understand your statement
The answer is d. dismantling stored fat in fat cells
