I think the answers repetition
It is an example of a Simile.
It compares one thing to another using "as", which is what a simile does.
Adding -s is the most common. for example: books, cups, pencils, etc. -es might have been the one that confused you, but that isn't a super common ending for plurals--instead, a more common one would be "-ies" which is when you drop the y (berry becomes berries, for example).
Answer:
Manny then goes back outside and shoots a flare from the flare gun .
