Which of the following accurately describes a factor of easements?

An easement is a legal right to use another person's land for a specific purpose and can be created in several ways. The correct answer highlights that easements can arise from express intent or necessity. When created by express intent, the parties involved explicitly agree to the easement, often documented in writing. This method allows for clear terms and conditions that govern the use of the easement.

On the other hand, an easement by necessity arises when one party needs access to their property, and that access is not possible without crossing another's land. This necessity typically occurs when a parcel of land is effectively landlocked, making it critical for the owner to acquire a right to cross the servient estate.

This comprehensive understanding of the creation of easements supports the correctness of the answer, as it emphasizes both the intentional and situational aspects of easement establishment.