the wording of the question is strange imo, but the way i read it was more like which main components influenced your education?? proponent is a strange word to use here bc it means to like be an advocate of something which doesn't quite fit, unless it's asking in the sense that it wants you to discuss someone or something that advocated for your educational choices.
what i would do is just discuss something that has really influenced your ideas about education and your decisions thus far. i suppose it could be a person, like your parents, or a concept, like ambition. that's the way i'm reading it!! good luck fam