To set off a parenthetical expression I believe.
In my opinion the best way for him to revise this essay it to double check his spelling and make sure his punctuation is correct and that he is capitalizing and spelling everything correctly.
It’s kind of saying if you’re too focused on one thing you’ll only find that one thing and if you’re only wanting to hear one thing you’ll only hear what you want to, sort of like close mindedness, and you won’t be able to see the other good things going on around you
<span>In the book "Farewell to Manzanar" Jeanne felt that the situation was her own doing and as such, her own fault. This was when she was a child and the whole issue was happening at that time. However, when she grew up and became an adult looking back, she grew angry with herself for not doing anything about the situation.</span>