Answer:
(a) A verbal conversation
Explanation:
A medium of communication is the source that is used to communicate between two or more persons.
A verbal conversation is the talk between two persons. There is no source involve in verbal communication. So, we can say that A verbal communication is not a source of communication. It is the way of communication that how we can talk to other person.
On the other hand, Writing on paper, the internet, The telephone are the mediums of communication. These are sources that can be used as source between communication of two person.
For Example
Writing a paper means write a letter to some person for communication. So the medium of communication is paper.
The Internet is also the source of communication between two person, With the help of internet we can call, write email and sms to other person for communication. We can say that, Internet is the medium of communication.
The Telephone is also used to talk on phone between two persons. It is also the medium of communication.
