Thanks, I am willing to help here. Good Luck with this in your debate class. Anyway, I believe that the legal guardian of a child under the age of 18 should first and foremost be the child's biological parents. If, however, that is not an option (i.e. the parents have passed away, or the parents have put the child in an orphanage) the decision should be made of someone of a higher power. It is only the best for the child, the child can't say - "Oh, I will live with Aunt X because she lets me eat candy and play Call of Duty." The child must be in the hand of someone that will love them and successfully provide for them. This decision is best left up to an adult or someone of a higher power (i.e. a judge)
Well a point that I have is that at the age of 12-17 a child should be able to determine whether or not they are in a safe environment. I believe that the child should have to speak in front of a court and state the reasons why they want to live with someone else; and if the reason is silly such as letting them eat candy and play COD, then it should be up to the court. But if they have valid reasons such as being abused, then I believe they're old enough to choose.