How is a casket defined?

A casket is defined as a rigid container designed to encase human remains. This definition is accurate because it encompasses the fundamental characteristics of caskets, which are typically constructed from wood, metal, or other durable materials and are specifically intended for the respectful and dignified housing of deceased individuals. The emphasis on being a "rigid container" highlights its structural integrity, which is essential for both burial and viewing purposes.

By understanding this definition, it also clarifies the role of caskets in funeral practices and emphasizes their function beyond just burial, as they may also be used for viewings or ceremonies. The other options do not fully encapsulate the primary purpose and design of a casket, nor do they describe the specific type of container that is typically employed in funeral services. This clarity is essential for professionals in the field to ensure the correct terminology and understanding of funeral service practices.