Final answer:
The Humane Slaughter Act is the law that mandates humane handling and stunning practices and procedures for the slaughter of animals in the U.S.
Step-by-step explanation:
The law that extends and sets forth humane handling and stunning practices and procedures is the Humane Slaughter Act. This United States federal law, which was enacted in 1958, requires the proper treatment and humane handling of all food animals slaughtered in USDA-inspected slaughterhouses. It aims to minimize suffering and ensure that animals are rendered insensible to pain before being slaughtered. While the Animal Welfare Act regulates the treatment of animals in research and exhibition, the Livestock Protection Act penalizes livestock theft, and the Animal Rights Legislation generally refers to laws that aim to protect animals from exploitation and abuse, it is the Humane Slaughter Act that specifically mandates humane slaughter practices.