Read this excerpt from Tim O'Brien's "Ambush"

"I had already pulled the pin on a grenade. I had come to a crouch"

which literary device is most clearly shown in this excerpt?

The literary device that is most clearly shown in this excerpt is Parallelism

Explanation:

Parallelism is a literary device that uses repeated grammatical structure in following sentences or paragraphs, these repetitions could be grammatical, phonetic, about meaning or meter. This device is commonly used in writing since it provides rhythm and it gives a smooth flow to the reading, besides it can also set the mood.

Answer: simile