Answer:
Family
Explanation:
A transition plan is a part of the Individualized Education Program or the IEP which refers to the transition aims and goals for the students. Such plannings are a method to recognize and develop objectives of the students which are completed or accomplished for the current year of schooling to help the student to meet his post-high school goals.
In the context, a complete information of a new student, Raquel who is a non verbal, can be collected from his family as his family is the only reliable source of information for me. Based on the information received from Raquel's family, I can make the transition plans for him.