Which of the following describes a linked dwelling?

A linked dwelling is characterized by its design, specifically focusing on how it is physically connected to another structure. In this case, describing a linked dwelling as a house where the primary wall is attached to another accurately depicts the essence of the structure. Linked dwellings often feature shared walls, which distinguishes them from standalone homes. This setup is typically found in urban or suburban environments where space efficiency is a priority.

The other options describe different types of housing but do not encapsulate the essence of a linked dwelling. A single-family home with no shared walls refers to a standalone property, while a duplex structure specifically denotes a residential building divided into two separate homes, which may not necessarily share a wall like linked dwellings do. A multi-family building encompasses a broader category that includes multiple living units, which can be entirely separate from each other. Thus, the specificity of a linked dwelling being connected by a primary wall is key in understanding its definition in real estate.