Telephones are used for communication by two people by transmitting sound, and sound Sound waves are mechanical waves. Given these facts, telephones are used for communication by two people by transmitting what?  among the following options:
- Transmitting illness.
 - chemical messengers
 - encoded information
 - electromagnetic energy
 - Television.
 - Communication degree.
 - Mechanical waves.
 - Electrical energy


 

       Mechanical waves.  