Final answer:
The AMBER Alert is the nationwide system used to assist in the quick recovery of abducted or endangered children, and it plays a vital role in child welfare and public safety.
Step-by-step explanation:
The nationwide system for assisting in the recovery of abducted or endangered children is known as the AMBER Alert. AMBER stands for "America's Missing: Broadcast Emergency Response." This alert system rapidly disseminates information about a missing child to the general public, through various means such as broadcasts on radio, TV, road signs, and digital platforms, with the aim of quickly locating and safely recovering the child. The AMBER Alert system is a critical part of child welfare and public safety efforts in the United States. Strengthening the child welfare system involves not only preventive measures to keep children safe but also effective response strategies like the AMBER Alert when children are endangered.