Which of the following is NOT a method for terminating an easement?

The correct answer is the increase in the easement's purpose, as this does not constitute a method for terminating an easement. Typically, an easement is established for a specific use or purpose, and if the purpose of the easement is expanded or increased, the easement itself continues to exist to fulfill that purpose. This reflects the ongoing nature of an easement, which remains valid until properly terminated through specific means.

In contrast, abandonment occurs when the easement holder demonstrates a clear intention to relinquish their rights, thus terminating the easement. Merging of properties happens when the dominant and servient estates come under the same ownership, effectively eliminating the need for the easement. Expiration of purpose applies when the original reason for the easement is no longer applicable, leading to its termination. These methods reflect legitimate means by which an easement can end, unlike an increase in its purpose, which does not result in termination.