Answer: Editing
Step-by-step explanation:
Between editing and revising (which would have been my top 2 answers at first glance), I would go with editing.
Editing is taking a second look at the writing and where you review sentence structure/wording, grammatical errors, and punctuation. This matches more to what Gabriela is doing.
Revising is the actual changing of ideas and where you cut, add, change, or move information.
Take a look at this piece written by University of Minnesota, "During revising, you add, cut, move, or change information in order to improve content. During editing, you take a second look at the words and sentences you used to express your ideas and fix any problems in grammar, punctuation, and sentence structure."
Hopes this helps!