Final answer:
Marie Petit's Yellow Pages ad for her real estate services is missing the name and contact information of the affiliated real estate brokerage, which is a typically required piece of information for such advertisements.
Step-by-step explanation:
In the context of a real estate advertisement, there are certain pieces of information that are typically required to be included for the sake of legality and professionalism. In Marie Petit's ad, she has listed herself as a Licensed Real Estate Salesperson and listed her specialty along with her contact number.
However, one critical piece of information that appears to be missing from her advertisement is the name and contact information of the real estate brokerage that she is affiliated with. Most jurisdictions require that real estate agents work under a licensed broker, and it's important for transparency and legal reasons to list the brokerage in all advertising.