Final answer:
An open adoption allows each party to have access to information and the possibility of contact, with various forms of communication agreed by everyone involved to ensure the child's best interests.
Step-by-step explanation:
The type of adoption in which each party has access to information about the other party, as well as the possibility of contact, is known as open adoption.
In an open adoption, there is a level of openness and transparency allowing adoptive parent-child pairs, birth parents, and adoptees to establish a relationship that may include various forms of communication. This can range from the exchange of letters and photos to regular visits or contact.
The degree of openness is agreed upon by all the parties involved in the adoption process, always bearing in mind the best interests of the child.