Which legal remedy is used for establishing rights to ownership of real property against others' adverse claims?

The legal remedy that is utilized for establishing rights to ownership of real property against adverse claims is a suit to quiet title. This action is specifically designed to resolve disputes over property ownership by clarifying and establishing the rightful titleholder, thereby eliminating any challenges or claims that may be presented by other parties.

By initiating a suit to quiet title, a property owner seeks a court judgment that affirms their title, which can effectively "quiet" any opposing claims to the property, providing them with a clear and uncontested title. This legal tool is crucial in scenarios where title issues may arise, such as when there are competing claims, boundary disputes, or uncertainties regarding the ownership history of the property.

Other options presented may relate to property rights or claims but do not serve the specific purpose of legally resolving and establishing ownership status in the same way a suit to quiet title does.