A legal easement may be created by all of the following EXCEPT:

A legal easement is a right to use another person's land for a specific purpose, and it can be created through several means. The correct choice indicates that an easement cannot be created through the merger of titles.

When two properties with an easement are owned by the same person, the easement is effectively terminated because the need for it no longer exists; the dominant and servient estates are combined into one ownership. This principle is based on the idea that there cannot be an easement over one's own property, as the easement serves as a right of use against another property owner.

In contrast, easements can indeed be created through a grant, where the property owner expressly conveys the easement rights; by prescription, where someone has used another's land openly and continuously for a certain period, thus acquiring a legal claim; and by implication, which may occur when a property is subdivided, and the necessity for access to a land-locked parcel becomes apparent. Thus, the merger of titles does not serve to create an easement, making this the correct response for the question.