Foster care adoption is the adoption of children in state care for whom reunification with their birth parents is not possible for safety or other reasons. It is arranged by state child welfare agencies or by private agencies under contract with the states. Children may be adopted by their foster parents, relatives (who may or may not have been caring for the child through kinship foster care), or adults to whom they have no prior relationship. Adoption from foster care has increased in the past five years in response to a federal mandate that states take timely action to provide permanent homes for children in state care.