Amelia lives far from her granddaughter but wants to be an active part of her life, so she has a skype conversation with her granddaughter every weekend. when amelia and her granddaughter talk, which part of the communication process would skype be considered?

Skype would be considered the channel.
Interpersonal communication is the process of exchanging information between two or more people. In order for the process to be effective, communication channels need to be established. A channel is considered the way or tool through which the message or information is transmitted. In this case, Skype is considered the channel, the medium through which Amelia and her granddaughter can have a conversation similar to a "face-to-face" conversation.