Answer: school district.
Explanation:
In Texas or even United States of America in general, the SCHOOL DISTRICT is a governmental body or entity that all United States of America Public school falls under its wings. The people operating the school district are appointed by the school boards and others or the people operating the school people can also be elected.
So, just as the question from above says, that is, ''...governmental entity would you approach to address concerns regarding disability services or student dress code for your child who attends a public school?'' and that would be the school district.