Respuesta :
Answer: Simile.
Explanation: A simile is a figure of speech that consists in making a comparison between elements that aren't obviously related, this comparison is made using the words "like" and "as." In the given passage we can see an example of a simile in the phrase "Like an oyster, he closed his shell, and wouldn’t talk to anyone" the speaker compares Armando with an oyster using the word "like."