Question

correct the one error.
free
legal
advise
(650) 555-6174
free legal advise

Explanation:

The error is in the word "ADVISE". The correct word for the noun form (when referring to professional guidance) is "ADVICE". "Advise" is a verb, while "advice" is the noun meaning recommendations or guidance. So we need to change "ADVISE" to "ADVICE".

Answer:

Change "ADVISE" to "ADVICE" (so the corrected text is "FREE LEGAL ADVICE").