Respuesta :
I believe this is an example of either situational or dramatic irony,
Answer: Irony
Irony refers to a rhetorical device in which what appears to be the case is in fact dramatically different from the reality. In this case, both Jim and Della believed themselves to be giving the perfect gift to the other person, not knowing that the other person was giving away the thing that was necessary for the gifts to work. This is an example of irony.