If Sam allows Carlos to park in his driveway during July, what type of permission has Sam given Carlos?

Sam has given Carlos a license, which is a temporary and revocable permission to use a specific property for a specific purpose—in this case, parking in Sam's driveway during July. Unlike an easement, which grants a legal right to use someone else’s property in a more permanent way, a license does not confer any ownership interest and can be revoked at any time by the property owner.

Labeling this scenario as an easement appurtenant or an easement by prescription would imply a more formal or enduring arrangement, with legal rights attached that are typically not revocable at will. A life estate relates to an interest in real property that lasts for the duration of a person's life, which does not apply in this scenario either. Therefore, the correct identification of the permission provided by Sam is a license, highlighting its informal and temporary nature.