Question

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation. you can wear button - down shirts tucked in for a formal look or unbuttoned with a tank top underneath for a more casual style.

Explanation:

The sentence presents two alternative ways to wear button - down shirts. When separating two independent clauses (or in this case, two related but distinct descriptive phrases about wearing the shirt) that are joined by "or" and are part of a compound sentence structure, a semicolon is appropriate here to show a stronger separation than a comma would, while still indicating the relationship between the two parts.

Answer:

You can wear button - down shirts tucked in for a formal look; or unbuttoned with a tank top underneath for a more casual style.