Which of the following describes an improvement that intrudes illegally on another's property?

Encroachment refers to a situation where one property owner unlawfully extends their property, such as a fence, building, or other structure, onto the land of an adjacent property owner without permission. This intrusion typically involves a physical structure that crosses the property line, violating the legal rights of the neighboring property owner. In real estate, encroachments can lead to disputes between property owners and may require resolution through negotiation or legal means to determine property boundaries and rights.

Eminent domain, on the other hand, is a legal process by which the government can take private property for public use, provided that they offer just compensation. Mortgages represent financing secured against a property, and equity refers to the value of an ownership interest in a property after deducting any liabilities. These terms are related to property rights and finance rather than directly describing illegal intrusions onto another's property like encroachment does.