Which structure is built for entombment and is often sold for single-family use?

The correct answer is the mausoleum, which is specifically designed for the purpose of entombment. A mausoleum is typically a standalone structure that houses the remains of one or more individuals and is often constructed as a more permanent resting place compared to a traditional grave. They can be designed for single-family use, meaning that they can accommodate multiple family members, often in a luxurious fashion, reflecting the family's status or opportunities.

Mausoleums are often constructed above ground, allowing for an architectural design that can be both functional and visually appealing, with elements like ornamentation and inscriptions. This distinguishes them from other burial options like a grave, which involves interment in the ground.

While tombs are also an entombment structure, they can encompass a broader range of designs and uses than a mausoleum, sometimes serving multiple families or being part of a larger complex. A grave refers specifically to the act of burial in the ground and is often a simpler, individual burial spot without the elaborate structure of a mausoleum. A cenotaph is a monument erected to honor a person whose remains are located elsewhere, meaning it does not serve as a burial site. Hence, the mausoleum is the most accurate answer for a structure built for entombment and