What causes the termination of a prescription easement?

The termination of a prescription easement occurs through various circumstances related to the use and rights associated with that easement. The correct choice highlights that if the holder of the servient estate openly prevents the use of the easement, this can lead to its termination.

In the context of easements, prescription involves acquiring the right to use a property over time, typically through continuous and open use without permission. If the servient estate owner actively obstructs the use of that easement in a clear and evident manner, it can undermine the easement holder's rights and can effectively terminate that easement, especially if such obstruction is consistent and lasts for a specific period.

The other options each present scenarios that do not inherently result in the termination of a prescription easement. For instance, if the easement holder dies, the easement may still exist unless specifically terminated or not transferable. A sale of the property by the easement holder does not automatically terminate the easement, as easements often run with the land and can be transferred to new owners. Formal revocation typically requires a specific process and is more common in contractual agreements than in the context of prescription easements, which are established through use rather than written agreements.