The punctuation should be a colon, if not then a coma but colon is definitely it.
Answer:
Walking in the rain is fun when you are sad.
Explanation:
Situational Irony
Situational irony is the contrast between what is expected to happen and what actually does happen. It refers to a specific situation or event. Verbal irony is the contrast between what someone says and what is actually meant. Think sarcasm. Dramatic irony is when the audience knows a key piece of information that a performer on stage does not. An example is Romeo and Juliet during the balcony scene. The audience knows Romeo is listening in on Juliet's private thoughts, but she does not. A conflict is a problem and the resolution is how it is fixed.
B, you need to give the reader basically a reason to read it so you give the hook and the topic of the sentence so basically what the story is going to be about.
