Final answer:
The ownership of a deed and the bundle of rights are used to define an "interest in real estate." Acreage is related to real estate but does not define an interest in it.
Step-by-step explanation:
The ownership of a deed is used to define an "interest in real estate." A deed is a legal document that transfers ownership of a property from one party to another. It serves as proof of ownership and contains important information about the property, including its boundaries and any encumbrances.
The concept of the bundle of rights is also used to define an interest in real estate. This refers to the various legal rights and privileges that come with property ownership, such as the right to possess, use, transfer, exclude others, and enjoy the property.
Acreage is a measure of the size of a piece of land, and while it is related to real estate, it does not necessarily define an interest in real estate on its own.