Final answer:
A snake's primary form of defense is its ability to kill or immobilize its prey. Most nonvenomous snakes swallow their prey alive, while venomous snakes use their venom to kill or immobilize their prey. Additionally, some snakes kill their prey by constriction.
Step-by-step explanation:
A snake's primary form of defense is its ability to kill or immobilize its prey. Most nonvenomous snakes swallow their prey alive, while venomous snakes use their venom to kill or immobilize their prey. Additionally, some snakes kill their prey by constriction.