Final answer:
The correct answer is option 2) Split hoofs.
Step-by-step explanation:
In Leviticus 11:27, it is mentioned that animals with hoofs were considered unclean. Specifically, the verse states that animals that walk on hoofs but do not have split hoofs were considered unclean. Therefore, the correct answer is option 2) Split hoofs. Examples of animals with split hoofs include deer, sheep, goats, pigs, buffalo, elephants, and giraffes.