Answer:
A healthy student body is a happy student body!
Step-by-step explanation:
Remember that parallel structure is a styllistic device and grammatical construction that characterizes for having two or more clauses, phrases or words that have a similar grammatical form and length. This means the sentence starts and ends with very similar phrases or clauses. In this way your writting gets rythm, balance, and clarity.
In this case Marcy repeats the words "student body" to emphasize the importance of it, she wants to show that she cares for the students in general.