by Word is easily the most attention because of the communication between people with people mainly by voice. praise helps people enthusiastic, comforting words relieved the sadness, advices for us to think more ventilation ... for example, if you are the worst students in the class and thanks to the try you have reached high score in an exam. When this praise from teachers, family is the main source of motivation for you to exert more of his ability. so communication great efficiency
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