Final answer:
The Child and Family Services Act is the act that provides details on circumstances that may signal a child is in need of protection, focusing on child welfare and safety.
Step-by-step explanation:
According to the Child in Need of Protection standard, the act that details circumstances for concern is the Child and Family Services Act. This act outlines the legal framework for child protection services, including circumstances that may indicate a child is in need of protection. Child protection standards are critical for ensuring the well-being of children and addressing issues such as child abuse, neglect, and the long-term consequences of maltreatment.