Question

add or remove commas, if necessary, until the sentence has correct punctuation. silena beauregard peeked into the haunted house through the spooky, glass, window.

Explanation:

Adjectives "spooky" and "glass" are not coordinate adjectives (they don't pass the 'and' - test: "spooky and glass" doesn't make sense), so no commas between them.

Answer:

Silena Beauregard peeked into the haunted house through the spooky glass window.