Irony and Ambiguity

At first, I thought irony was the situation of the story, but I learned that this was wrong. Actually, irony is the difference between what the reader expects or what seems suitable and the reality of what happens. There are three types of irony: verbal irony, situational irony, and dramatic irony.
I also learned about ambiguity. I used to think ambiguity was the reaction to the situation, but I learned that ambiguity is a part of a text that may have multiple meanings.
On my irony and ambiguity pretest, I was far below grade-level. On my posttest, I hope that I will be at grade-level.