I'm assuming the underlined conjunctions are <em>both </em>and <em>and </em>(because you didn't underline any, and those are the only two conjunctions in the sentence).
Those conjunctions are called correlative conjunctions - this means that they are connecting two items which are equally important. So, this woman saw both Billie Holiday and Ella Fitzgerald - and both of those artists are important to the woman.
The language must be appropriate to the audience and should use the terms that are most current and ordinary. Using fancy language is not ordinary, and any kind of unfamiliarity can be seen as suspicious.
It would most likely be an informational/explanatory essay because she is seeking to inform the readers about the school event.
I would first start off how to plan the farmers market. I would write about how hard it is to organize such a big event. I would also at the pros and cons of the event making. I will also add how the event helped the school and it’s community. Also be slightly persuasive , so you’re reader can get a better on how the experience was and why it was started .