According to the context of the sentence, it can be inferred that the term that correctly completes the sentence is "conversation".
A conversation is a term to refer to a communicative activity between two or more people who take turns in the role of sender and receiver to transmit messages.
Conversations can have various characteristics such as:
According to the above, it can be concluded that conversations can be casual, flow naturally and involve knowledge.
Learn more about conversation in: https://brainly.com/question/13266623
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