the element that is best represented by the excerpt is: stage directions,
it is shown by using imperative forms of verbs ( exit, enter)
3 one Lisa want to go quickly
The body will use glycolysis and aerobic respiration as processes to help sustain a person through a race. These are all processes that occur within the musculoskeletal system of the body. They help in sliding the muscle back and forth in order for it to produce the necessary movements it needs and the ample energy that is needed for a particular activity.
I think it's a pun (basically a joke that is related to a specific word, like its meaning or sound) - because it's wordplay about light vs heavy