An explanation of how the child's development may be affected by the problems described in the scenario
The scenario could be noticing a child always sitting alone. Never with anyone and sometime talking to themselves or imaginary friend. When someone walks around them the child gets defensive of their personal belongings and gets bullied for them being weird.
The problems:
Sitting alone
Having only imaginary friends
Gets bullied by classmates for being weird
Gets defensive when it comes to their stuff.