Which of the following is the best description of an adoption

Hello, hope this helps you out i just stated a few things i know about adoption, let me know if you need any more detail and information. :P

So basically, Adoption is a process where a person assumes the parenting of another, usually a child, sometimes can be a teen, from that person's biological or legal parent or parents, and, in so doing, permanently transfers all rights and responsibilities, along with filiation, from the biological parent or parents.  Unlike guardianship or other systems designed for the care of the young, adoption is intended to effect a permanent change in status.

Hope i have helped you out a little, pm me if you need any more details or information.

i thinking chemical change