Final answer:
The agent has committed an act of misrepresentation by falsely claiming that the insurer is a member of the Insurance Guarantee Association.
Step-by-step explanation:
The agent has committed an act of misrepresentation by advertising that the insurer to which they are appointed with is a member of the Insurance Guarantee Association. Misrepresentation refers to providing false or misleading information about a product or service. In this case, the agent is falsely claiming that the insurer is a member of the association, which could mislead potential customers.