In funeral merchandising, which term describes the main body structure of a casket?

The correct term that describes the main body structure of a casket is "shell." In funeral merchandising, the shell encompasses the outer structure of the casket, including its sides, ends, and top. It is crucial as it not only contributes to the aesthetic appearance of the casket but also its durability and functionality. The shell serves as the protective housing for the deceased and is typically the part that is on display during viewings.

While "body" could imply the main part of something, in the context of caskets, it does not specifically refer to the outer structure. "Frame" generally refers to the underlying support mechanism within furniture or structures but does not accurately describe the overall covering of the casket. Lastly, "box" is an overly simplistic term that does not capture the intricacies or specific designations typically used in the funeral industry. Therefore, in this context, "shell" is indeed the most precise term to use to describe the main body structure of a casket.