Step-by-step explanation:
In this short into it is explained that there is another story in the introductory story. The first story is Dweck who is opening and reading her article. The second is a story about Jonathan, who is a student with difficulties in school.
This intro is effective because if foreshadows in which direction will story go. This kind of intro is effective and can make the readers more interested at first glance.
This kind of intro is effective and can make the readers more interested at first glance. These two connected stories can be interesting for the readers to think about what will be the idea, theme and narrative in the story.
It is expository and gives the readers the background of the story. It is also foreboding because it gives the readers the basis to make an assumption and predict the possible actions or events in the story.