Final answer:
Antivenin is an antitoxin used to treat snakebites.
Step-by-step explanation:
The subject of this question is Biology. Antivenin is an antitoxin used to treat snakebites. It is obtained by injecting a lab animal with a specific snake venom antigen, and then harvesting the antibodies from its serum. These antibodies will bind to and neutralize the toxins in snake venom when administered to a human bitten by a snake.