Answer:
Communication models help identify and understand the components and relationship of the communication process being studied. Models represent new ideas and thought on various aspects of communication which helps us to plan for effective communication system.
In order to complete this analogy, we need to understand the meanings of the first pair of words. To apprehend and to emancipate and antonyms, meaning they have opposite meanings - to apprehend means to arrest, and to emancipate means to free. Having this in mind, we need to find another pair of antonyms. The correct answer should be E. conceal : manifest, because to conceal means to hide, and to manifest means to show.