Question

find the relative clause. if it is nonrestrictive, set it off with commas. if it is restrictive, submit the text without making any changes.\if you dont consider the audience that youre writing for, you may find yourself without an audience at all,\ the creative writing instructor cautioned her students.

Explanation:

The relative clause "that you're writing for" is restrictive: it narrows down which specific audience is being referred to (it's essential to the meaning of "the audience" by specifying the one the writer is targeting). Restrictive relative clauses do not require commas.

Answer:

"If you don't consider the audience that you're writing for, you may find yourself without an audience at all," the creative writing instructor cautioned her students.