What term describes the disposition of human remains by burial without formal viewing or ceremony?

The term that accurately describes the disposition of human remains by burial without formal viewing or ceremony is "direct burial." This approach typically involves interring the body shortly after death, without a scheduled service or public memorial beforehand. It is often chosen for its simplicity and cost-effectiveness, reflecting a desire for efficiency and privacy in the burial process.

The other terms, while related, do not specifically imply the absence of a viewing or ceremony. For instance, "immediate burial" could suggest a prompt action but may still include some arrangements that could involve minimal ceremonies. "Ground burial" refers more generally to the act of burying in the ground and does not specify the conditions surrounding that burial. "Simple burial," while it may seem akin to direct burial, does not have a standardized definition in funeral practices and could potentially imply fewer arrangements rather than no ceremony at all.