Which of the following is NOT one of the three parts of communication?

The three essential parts of communication are the sender, the message, and the audience. The sender is the person or entity that initiates the communication, while the message is the information or content that is being conveyed. The audience is the group or individual that receives the message.

The term "receiver" can sometimes be used interchangeably with "audience," but it is not typically recognized as one of the core components in the classic model of communication, which emphasizes the roles of the sender, message, and audience as the primary elements of effective communication. Thus, when identifying which option does not fit within this model, "the receiver" stands apart as it is more of a role than a distinct component like the others in the communication process.