Atelephone is used for communication by humans over long distances, and effective communication requires skills in conveying and receiving messages. Given these facts, what does a telephone help humans do over long distances among the following options:
- send files
 - Transfers energy
 - lowered energy cost
 - hold hands
 - extremely important
 - conveying and receiving messages
 - watch television
 - A transportation fuel


 

      conveying and receiving messages   