The document discusses communication models and concepts. It summarizes Shannon and Weaver's transmission model of communication which includes a sender, encoding, message, channel, receiver, decoding, and feedback. It also describes the differences between verbal and nonverbal communication. Finally, it outlines five main communication environments: intrapersonal, interpersonal, small group, community/public, and mass communication. It defines argumentative communication as being prompted by disagreement, confusion, or ignorance that people wish to resolve.