Speaker - Speech - Audience model of communication is given by:

Communication is the process of exchanging information between a sender and a receiver. Various models have been developed to explain how communication takes place, focusing on different elements such as the message, sender, receiver, and feedback. 

Key Points

• The Speaker-Speech-Audience model was introduced by Aristotle, an ancient Greek philosopher and rhetorician.
• This model highlights three essential components of communication: the speaker, who conveys the message; the speech, which is the content being delivered; and the audience, who receives and interprets the message.
• Aristotle emphasized the importance of ethos credibility, pathos emotional appeal, and logos logical reasoning in communication.
• The effectiveness of communication in this model depends on how well the speaker organizes and presents the speech to influence the audience.

Thus, it is concluded that Speaker - Speech - Audience model of communication is given by Aristotle.

Hint

•  Leagans contributed significantly to agricultural communication and education but did not propose the Speaker-Speech-Audience model. 
• Berlo introduced the SMCR model Source-Message-Channel-Receiver, which explains communication as a linear process influenced by factors such as communication skills, attitudes, and social systems. 
• Westley, along with MacLean, developed a model of communication that highlights feedback and the role of mass media in shaping messages.