Why, in this sentence do you use "isn't", when "isn't" is a contraction of "is not". the sentence is, "isn't that right? "

Ineed .. read the passage, and choose the two (2) inferences that are most firmly based on the given information. eye contact, also referred to as gaze, is how—and how much—we look at peoplewith whom we are communicating. eye contact has several purposes incommunication. its presence shows that we are paying attention. in addition, how we look at a person reveals a range of emotions such as affection, anger, or fear. moreover, intensity of eye contact may also be used to show dominance. for instance, we talk of someone “staring another person down.” finally, through ou reye contact we can check the effect of our communication. by maintaining our eye contact, we can tell when or whether people are paying attention to us, when people are involved in what we are saying, and what their feelings are about what we are saying. 1. eye contact can be a clue to what we feel and what our listeners feel. 2. our eyes are more important than our ears in effective communication. 3. eye contact can never reveal how much power one person has overanother. 4. sometimes a parent can control children just