Yes most schools has at least on dietitan so they can balance the food out.
I can help you if you provide a little more information :)
Thoughts and/or emotions prevent a person from functioning normally. The first one isn’t right as a person with mental illnesses may not have delusions, the same with the third one a person with mental illness may not be nervous or sad, and schizophrenia and bipolar are mental disorders but it is not limited to those.