Nonverbal communication is all communication that is not verbal, that is which is not using language.
It can include such ways of communicating as Posture (can show whether a person is happy or sad), clapping and eye contact.
So the correct answer is: "all of the above".
Answer:
When Mika shut off the lights, she heard an odd buzz.
Sibling rivalry is the jealousy, competition and fighting between siblings.