Answer:
The correct answer is d. setting. A medium refers to the means or method through which a message or story is conveyed. In this case, the options given are examples of different elements in a story. A plot refers to the sequence of events in a story, a chalkboard is a physical object, and adventure is a type of story or experience. On the other hand, a setting refers to the time and place in which a story takes place. It provides the backdrop and context for the events that unfold. Therefore, out of the options given, setting is the example of a medium.
Step-by-step explanation: