During exercise, we undergo respiration. Therefore, we need oxygen and release carbon dioxide and water as waste products. When exercise become vigorous, we only run on anaerobic respiration with little oxygen, then lactic acid becomes a waste product instead of carbon dioxide and water. This occurs due to incomplete breakdown of glucose.
Best answer is C. lactic acid.
No it’s not okay to hurt yourself you might go through sad moments and to help you might need a good cry. But no it is not okay to harm yourself.
They make your bones stronger because your bones have to maintain to hold the weight.
