What is the goal of thematic writing?
to tell an interesting personal story
to express an idea or insight about life
to stir strong emotions in the reader
to change readers' minds about an issue

Thematic writing is defined as the writing which is used to express an idea or insight about life.

Explanation:

This can be done with the help of a story which can be personal or otherwise. It sets the theme and sheds light on the same so that the readers get the complete idea of the subject which is being talked about. It gives a thought to a subject or the topic and sets the theme of the entire writing.

you have approval for this story

explanation:

and also the mystery girl it might be someone that she might know in her school

"a" because he is appealing to logic as oppose to appealing to the audience's emotions.