Which type of easement allows for public access to a property?

The type of easement that allows for public access to a property is an in gross easement. This type of easement is specific because it benefits an individual or entity rather than a specific piece of land. For example, a utility company may have an in gross easement that allows them to run power lines across private property, providing access for service and maintenance.

When considering the other types of easements, appurtenant easements involve a dominant and servient estate, where the right is tied to the land rather than an individual. Prescriptive easements arise from continuous and open use of someone else's property without permission, typically over a period of time, but these do not openly confer rights to the public at large. Conservation easements are designed to protect natural resources and restrict the development of land but do not inherently provide public access.

Thus, in gross easements are utilized specifically for instances such as utility access, making them the correct answer for scenarios involving public access.