Berlo’s SMCR (Source-Message-Channel-Receiver) model describes communication as a linear process with the following sequence:
1. Source (A): The sender who initiates communication, encoding the message based on their knowledge, skills, attitudes, and cultural context.
2. Message (B): The content, ideas, or information being conveyed, structured with specific codes, elements, and treatment.
3. Channel (C): The medium used to transmit the message, such as oral (speech), written (text), or sensory (visual, auditory) channels.
4. Receiver (D): The recipient who decodes and interprets the message, influenced by their own skills, attitudes, and context.
This sequential flow from Source to Receiver via Message and Channel makes option (1) correct.