What type of transactions are secured by purchase money mortgages or deeds of trust?

Purchase money mortgages or deeds of trust are specifically designed to secure loans that are used to finance the acquisition of real property. When a buyer obtains a loan to purchase a home or any other type of real estate, that loan is secured by the property itself through a purchase money mortgage or deed of trust. This means that the lender has a lien on the property until the loan is satisfied.

In contrast, refinancing agreements typically involve existing mortgages being replaced or modified rather than resulting in a new purchase. Rental agreements do not involve the acquisition of property, and therefore, they do not relate to purchase money mortgages or deeds of trust since no property purchase occurs. Lastly, transactions involving only cash purchases do not require a mortgage or deed of trust at all, as there is no borrowing involved.

Thus, the correct answer identifies transactions that involve borrowing funds specifically aimed at acquiring real property, encapsulating the primary role of purchase money mortgages and deeds of trust in real estate transactions.