How does this diagram facilitate the text? a.
helps you to understand the structure and application
b.
reinforce the text
c.
both of these
d.
neither of these

I believe A because it just names the structure of it

Allusion and illusion. an allusion is an indirect reference, whereas an illusion is something that is unreal or incorrect. each of the nouns has a related verb form: allude “to refer indirectly to,” and illude (not a very common word), which may mean “to delude or deceive” or “to subject to an illusion.”