Answer:
The answer would be Medium and Channels in the blanks respectively.
Step-by-step explanation:
The medium is the form a message takes and Channel is the system used to deliver the message.
Medium is the means of communicating the message. Whereas Channel is the way through which the message is transferred.
A message is transferred from a sender to a receiver. The medium of message can be Oral, Written or Non Verbal, whereas the channel could be Electronic means or printed media.