Answer:
-The use of jargon
-Emotional barriers and taboos
-Lack of attention, interest, distractions, or irrelevance to the receiver
-Differences in perception and viewpoint.
-Physical disabilities such as hearing problems or speech difficulties
Explanation: There are way to many barriers to write. Effective communication is a two way street, so if, for whatever excuse, both ears and heart aren't in the conversation then the words are literally as old people say, "Going in one ear and out of the other." Communication is also about respect.