Question

fix any errors with subject - verb agreement below. click submit answer if there are none. the blue shirt, not the red one, look better with my skirt, in phineas flynns opinion.

Explanation:

The subject of the sentence is "the blue shirt", which is a singular noun phrase. The verb must agree with this singular subject, so "look" (plural verb form) is corrected to "looks" (singular verb form) to fix the subject-verb agreement error.

Answer:

The blue shirt, not the red one, looks better with my skirt, in Phineas Flynn's opinion.