Questions: A channel, also known as the is the method a sender uses to deliver a message.

The answer is "medium": A channel, also known as the medium, is the method a sender uses to deliver a message.

Explanation for each option:

• Feedback: This refers to the response or reaction of the receiver to the sender's message. It is not the method of delivery, so this option is incorrect.
• Message: This is the content or information that is being communicated from the sender to the receiver. It is not the method of delivery, so this option is incorrect.
• Medium: This is the correct answer. The medium is the channel through which the message is transmitted from the sender to the receiver. Examples include spoken words, written text, email, or social media.
• Encoding: This refers to the process of converting the message into symbols or a format that can be communicated. It is not the method of delivery, so this option is incorrect.