Final answer:
A listing agreement must be signed by the property owners, as they are the ones who hold the title and legal authority to contract for the sale or lease of the property.
Step-by-step explanation:
A listing agreement must be signed by the owners of the property since the ownership gives them the right to enter into contracts concerning the property. The significance of the owners' signature is grounded in the fact that they hold the title to the property and have the legal authority to make decisions pertaining to its sale. An owner's attorney, mortgagee, or buyers do not have the primary right to execute a listing agreement unless specifically authorized by the property owner.
Additionally, in terms of delivering possession, it is the responsibility of the owner to ensure that they can provide the residence to the residents on the agreed date. If not, the agreement may be terminated, demonstrating again the importance of the owners' role in agreements related to property.