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

The correct answer highlights that an increase in the easement's purpose is not a method for terminating an easement. An easement is a legal right to use someone else's property for a specific purpose, and it is typically created for a fixed purpose. Increasing the purpose of an easement does not lead to its termination; rather, it may involve paperwork or modifications to the original agreement but does not eliminate the easement itself.

In contrast, abandonment occurs when the owner of the easement no longer intends to use it, and this may lead to its termination. Merging of properties happens when the properties involved in the easement are owned by the same entity, which can cause the easement to be extinguished. Lastly, expiration of purpose refers to situations where the original reason for the easement is fulfilled or extinguished; thus the easement would end. Therefore, only an increase in the purpose does not constitute a method for terminating an easement.