I need help fast What is the situational irony in the passage

Which inequality is represented by this graph? f(0, 1)

The interaction between joanna and triburcio can best be described as a) heated b) apathetic c) despondent d) hopeful

Ineed simplifying this thesis and making it easier to understand for the reader (more concise) "no matter how religious one may be, one’s faith tends to change under unexpected and challenging circumstances."