When mark and cindy fight, mark knows when cindy is really upset. because every time mark will ask if something is wrong, cindy will scream "everything is fine! " mark knows that because she is screaming, her indicates that she is mad?

PARALANGUAGE. Cindy's tone, pitch, and volume of her voice indicates that she is mad. Sometimes an individual's body language can tell us more about how they are actually feeling, than the words that they are speaking. Body language is a crucial aspect of communication, and if someone is verbally saying one thing, and their body language and tone of voice is indicating another thing, people will notice.

You love them i guess