Final answer:
Ben has a license to hunt on his neighbor's land, which is a revocable permission and can be withdrawn by the landowner at any time without cause.
Step-by-step explanation:
When Ben has been given revocable permission to hunt on his neighbor's land, he has what is known as a license. A license in legal terms is the grant of a right to do something on another person's property without gaining any interest in the property. This permission is revocable, which means that the property owner can withdraw it at any time and for any reason, unless there's a binding agreement to the contrary.