A petition to terminate the relationship between a parent or an alleged parent and a minor child may be filed in a proceeding for adoption under this title by:
(1) a parent or a guardian who has selected a prospective adoptive parent for a minor and who intends to place, or has placed, the minor with that person;
(2) a parent whose spouse has filed a petition under Article 4 of this title to adopt the parent’s minor child;
(3) a prospective adoptive parent of the minor who has filed a petition to adopt under this article or Article 4; or
(4) an agency that has selected a prospective adoptive parent for the minor and intends to place, or has placed, the minor with that person.