The subject for my essay is Grief; the theme is that refusing to accept the loss

The subject for my essay is Grief; the theme is that refusing to accept the loss of loved ones can lead us to stop moving on and be emotionally unstable.
For the Body Argument, I use three quotes from the Novel
I submitted it already, but the professor commented on the submission:” This essay does not follow organizational directions or MLA format for spacing. The essay is short/underdeveloped. You label the part of the essay. This is outside the directions.