When liz asks her father if he minds her borrowing the car, she notices he frowns and shakes his head. What is liz observing in her father? Noise decoding feedback context?

I believe the answer is: feedback

In communication context, feedback refers to the reply that people give after they receive and decipher a certain message. Feedback could be both positive and negative. What liz experienced above is not what she expected, and would be considered as a negative feedback from the father.