Dramatic irony is irony that is in inherent in speeches or a situation of drama and is understood by the audience but not grasped by the caracters.
In this case, Gus in unaware that the badger will probably attack him. The badger has a know reputation of chewing through things and even snarled at Gus.
I wasn't sure myself, but this seems like the only answer that sounds correct... I really hope this helps you! (If you would like an explanation, I can comment it below) xx
