Final answer:
A written agreement where one party sells property to another for money is known as a business contract. It contains the terms of sale, including price and property details, and may include additional service contracts.
Step-by-step explanation:
When one party agrees to sell a piece of property to another in exchange for a set amount of money, and this agreement is in writing, they have what is known as a business contract. This type of contract is a legally binding agreement that outlines the specific rights and obligations of each party involved. In the context of property sale, it would include terms such as the sale price, the description of the property, and any conditions for the sale such as warranties or service contracts. Service contracts are additional agreements where the seller may agree to fix or maintain the property for a certain period in exchange for an extra payment.