(b) the speaker creates a personal tone with the audience
Empathy is important when giving humor because you have to also feel what that other person is feeling and how they’re going to take your joke. If you were upset and you started joking on someone that might tear them down even more. You have to know when it’s time to be serious and not to be.
I’m not sure if that’s the answer, I just wanted to try and help.
It lets the reader know where important information is located.
