What occurs in the primary chamber of a retort?

The primary chamber of a retort is specifically designed for the incineration process where primary ignition and burning of human remains take place. During cremation, the temperature in this chamber is elevated to facilitate the combustion of organic material and to facilitate the transformation of human remains into ashes. The design of the retort ensures an efficient and controlled environment for this process, which includes proper airflow and consistent heat distribution to expertly manage the burning.

In contrast, other options do not accurately reflect the primary function of the retort’s primary chamber. Heating cremated remains occurs in a more controlled manner after the initial combustion, while storage of unburned materials and pulverizing of bone fragments are processes that occur at different stages of the cremation cycle, rather than in the primary chamber itself. Hence, the focus of the primary chamber is unequivocally on the ignition and incineration of human remains, making option C the correct answer.