Which of the following best defines a mobile home?

The definition of a mobile home encompasses characteristics that include being transportable and often having a design that includes wheels, allowing it to be moved from one location to another. This distinguishes mobile homes from other types of housing, such as conventional houses or seasonal dwellings.

A mobile home is specifically designed to be mobile, enabling it to be relocated, which is a critical feature of such residences. The aspect of being "often on wheels" emphasizes the transportability aspect inherent in mobile homes, making option B the most accurate description.

In contrast, options that suggest a permanent attachment to land (such as affixing a home to land) or refer to houses built on foundations do not capture the essential quality of mobility that defines a mobile home. Additionally, a seasonal dwelling focuses on its use during certain periods of the year, rather than the fundamental mobility characteristic of a mobile home. Thus, the correct answer aligns closely with the primary nature of mobile homes as designed for transportability.