Answers

2014-11-23T13:08:34+05:30
Radio is a background medium. most listeners are doing something else while listening,which means your thought has to work hard to be listened to and understood.
the line through which you are sending yor thought can get fussed up or not clear
listeners cannot refer back to your thoughts to go over important points.

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2014-11-23T20:01:04+05:30
 only there is audio and there is no vision
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