Ambiguity and irony

At first, I thought irony was something about an iron, but I learned that this was wrong. Actually, irony is the difference between what the readers expect or what seems suitable and the reality of what happens. There are three types of irony: Dramatic irony, Situational irony, and Verbal irony
I also learned about ambiguity. I used to think ambiguity was a situation that happens to a character, but I learned that ambiguity is a part of a text with multiple meaning in which something can be interpreted in a number of different ways.
On my irony and ambiguity pretest, I was below grade-level. On my posttest, I hope that I will be above grade-level.