What is the name of the tract of land that is burdened by a servitude or easement?

The correct choice is the Servient Estate. This term refers to the parcel of land that is burdened by an easement or servitude, meaning that it allows another party certain rights over it. In the context of property law, a servitude or easement grants specific rights to a dominant estate, which enjoys benefits from the servient estate.

For instance, if someone has an easement that allows them to cross someone else's property to access their own, the property being crossed is the servient estate because it is bearing the burden of this easement. Understanding this distinction is crucial in real estate as it clarifies the rights and responsibilities of different property owners in relation to one another.