What action constitutes child abduction according to the provided information?

The action that constitutes child abduction in this context is concealing or detaining a child without legal custody. This definition underscores the importance of legal guardianship and custody rights, highlighting that abduction occurs when an individual unlawfully holds or hides a child against the lawful authority of the child's parent or legal guardian. The act of not having legal custody implies that the individual lacks the lawful right to make decisions regarding the child's welfare or whereabouts.

In contrast, removing a child from their home with parental consent is a lawful action. Providing care for a child in a foster home occurs within the bounds of legal processes and is sanctioned by child welfare laws. Additionally, adopting a child through legal means follows established legal procedures, ensuring that the rights of the biological parents are respected and that the adoption is legally binding. Thus, only the act of concealing or detaining a child without legal custody aligns with the definition of child abduction.