The correct answer is b) example.
The type of context clue that can be used to determine the meaning of the underlined word (native) is “example”.
Marsupials such as Kangaroos, Koalas, and Wallabies are native from Australia. The word “native” associates a person or a specie to a certain place. In this case, it could be a plant, a tree or an animal that belongs to a specific location. This means that marsupials such as Kangaroos, Koalas, and Wallabies are native from Australia, which means that those animals are only found in Australia.
