Final answer:
An unlicensed personal assistant cannot perform licensed activities like hosting open houses, negotiating contracts, or providing legal advice, especially in fields like real estate.
Step-by-step explanation:
An unlicensed personal assistant is limited in the type of activities they can perform, especially when it comes to real estate or legal matters which often require a license to practice. Specifically, in the context of real estate, an unlicensed personal assistant cannot engage in activities that require a real estate license, such as hosting open houses, negotiating contracts, or advising on legal matters. These tasks are reserved for individuals who have the requisite licensure to ensure that they are knowledgeable in the legal intricacies and ethical considerations involved in such work.