Which of the following describes a tort to realty?

The correct choice identifies a tort to realty as a common law doctrine that serves to protect the interests of property owners. This concept encompasses various forms of interference with a person's right to use or enjoy their real property. Torts to realty include actions such as trespass, nuisance, and other invasions that can disrupt the rightful possession and enjoyment of land.

In essence, this answer highlights the legal protection afforded to property owners against unlawful interference, establishing a foundational principle in property law that balances individual rights with broader community interests. In contrast, the other options focus on different legal concepts—such as property transfer, agreements about land usage, and zoning regulations—that do not specifically pertain to the tortious aspect of realty interests.