You can show positive body language with your mouth By keeping your mouth closed except to say "yes" or uh-huh By pressing your lips tightly together to show disapproval by keeping your mouth closed and not responding at all by pressing your lips together and signing loudly at times

Correct Answer: By keeping your mouth closed except to say "yes" or uh-huh

Explanation:

Body language is a process whereby a message is passed across to another individual through the action and reactions of the parts of the body. For example, some use the nodding of head to signify agreement while others shows likeness of another persion by winking one of their eye.

Keeping the mouth shut except to say Yes or Uh-huh is one of the way to show positive body language.