What is a mausoleum?

A mausoleum is a building specifically designed to house the remains of the deceased in crypts or vaults, making option B the most accurate description. This structure serves as a permanent memorial and can be elaborately designed, often showcasing artistic elements to honor those interred within. Mausoleums differ from traditional burial methods as they provide above-ground entombment, allowing for a more grandiose and customized space for families to commemorate their loved ones.

The other options do not accurately represent a mausoleum. A movable structure for storing ashes refers to an urn, which specifically holds cremated remains rather than entombment. A type of coffin used in entombment describes a different aspect of the burial process, emphasizing the container for the body rather than the building itself. A plot of land designated for communal burials contrasts with the individual and often private nature of mausoleums, focusing instead on larger areas used for interring multiple individuals. Therefore, the definition of a mausoleum as a structure for containing crypts or vaults is distinct and correct.