Answer:
D
Information box, chart and Subheading are all things that can be found in an informational text and in any text in general. Illustrations can also be found in certain novels, stories and other fictions although they are not present in numerous texts depending on the author and genre. While I don't know what text it is talking about or what your teacher taught, I would go with D, Illustration since it seems to be the outlier out of the choices.
Explanation: