Which of these identifies a manufactured home and not a modular home?

A manufactured home is specifically designed to be movable and is built primarily in a factory, which includes a construction process that allows for components to be assembled at various locations. The defining characteristic that distinguishes a manufactured home from a modular home is the inclusion of a wood or steel chassis underneath. This chassis provides structural support for the home while allowing it to be transported to its intended location.

In contrast, modular homes, which are also built in a factory, differ in that they are constructed to local building codes, often have permanent foundations, and do not maintain a transportable chassis once placed on-site. They are typically assembled in sections and are considered real property once they are attached to a permanent foundation, similar to traditional site-built homes.

The other options, such as a permanent foundation and customizable design, do not distinctly differentiate a manufactured home from a modular one, as both types can be designed to be customizable and may use permanent foundations in certain contexts. A modular home is built on-site by assembling prefabricated parts, which is another key difference from manufactured homes.