The first is the best thesis
The sentence which most clearly discusses medium is:
C. Listening to a storyteller is the oldest and purest way to enjoy a tale.
- Medium refers to the channel or instrument used for communication. Examples of media are: <u>books, newspapers, radio, TV, etc.</u>
- When we tell a story, the most common media used are probably movies (or the physical media where they are shown, such as the TV or the cinema) and books.
- However, the oldest medium for telling a story is our own mouths. In other words, a storyteller is also a medium.
- Among the options given in the question, letter C is the one that discusses medium when it mentions listening to a storyteller.
- Options A, B, and D do mention books and movies, but not as a medium for telling stories. They discuss those things in a more general way, considering other aspects.
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i think it is a chain reaction.
a chain reaction is a series of events caused by the previous one. Or if you mean scientifically a chain reaction is a chemical reaction or other process in which the products themselves promote or spread the reaction, which under certain conditions may accelerate dramatically.