Final answer:
This is an example of an easement, which is a legal right to use someone else's property for a specific purpose.
Step-by-step explanation:
This is an example of an easement. An easement is a legal right to use someone else's property for a specific purpose. In this case, the agreement allows you to cross your neighbor's property to get to the beach. However, the easement is terminated if you move or die, as stated in the agreement.