Vestigial usually refers to traits which over evolution have lost their main function and are less useful than they once were.
In number one Hunter means that he thinks the teeth were from the ancestor whale shark but are now useless or nearly useless to the current whale shark.
Answer:
Judy,the dog owner, was walking the dog, max, to let out all of his energy.
If this is referencing the Project, then this would be expository/non-fiction.
If this is referencing the film, then the genre is horror/fiction.
