Gray water is untreated waste water. You might use this water for flushing toilets
Your mouth, nose, throat, sinuses and lungs are lined with mucus membranes. These membranes contain mucus glands that produce - surprise - mucus. Mucus-producing membranes line specific passages in your body, like the respiratory and digestive tracts, for protection and support.
<span>If Rob sometimes confuses real and imaginary events, he is suffering from schizophrenia. This is a type of a mental disorder when a person cannot distinguish what's real and what's imaginary. Impulse-control disorder has to do with having an abnormal desire to have everything under control. Conduct disorder are also known as antisocial behaviors.</span>
It is D, sharing appreciation for what is being said. Both A and B aren't crucial to being a good listener, in fact in practice they effectively draw attention to yourself, which would be fine if the question was regarding being a good conversationalist. Additionally, C is just completely irrelevant, that wouldn't even be a good conversation practice, let alone a trait important to listening.
