Answer:
non-directive interview
Step-by-step explanation:
A non-directive interview is a type of interview that do not follow a definite structure. The interview is more flexible and changes the course of questions with the progression of the time. It is more flexible and the questioning area is wider that the directive interviews. The conversations are unprepared and they are subjective in approach. The answers to such questions are not strict to one answer, rather the answers depend on the interviewee's understanding and critical approach.
In the given situation, the non-directive interview has been conducted by Anthony. The course of questions shifted from the position of the volunteer guide to that of the reactions of the children about art.