Final answer:
The list provided mixes characters from Marvel and DC comics. However, the Avengers mentioned are Iron Man and Black Widow, as Batman and Wonder Woman are part of DC Comics.
Step-by-step explanation:
The question seems to be asking which avenger the student should 'text a mum' as part of a school exercise or a playful activity. If we're looking at the list provided, it includes a mix of characters not all of whom are traditionally part of the Avengers team in the Marvel Universe. Batman, for instance, is a DC Comics character and is not considered an Avenger. Meanwhile, Wonder Woman is also from DC Comics and is not an Avenger. Iron Man and Black Widow, however, are members of the Avengers team in the Marvel Comics and cinematic portrayals.
If one is to choose from the Marvel characters provided as the answer, Iron Man and Black Widow would be the correct choices. Providing this guidance can help the student understand the difference between the two main comic universes (Marvel and DC) and ensure factual accuracy in their response.