Final answer:
The best environmental conditions for long term storage of a body until Spring burial include a dry environment, low oxygen levels, and controlled temperature and moisture levels.
Step-by-step explanation:
The environmental conditions which are best for long term storage of a body until Spring burial include a dry environment, low oxygen levels, and controlled temperature and moisture levels. In a dry environment, the body is less likely to decompose quickly. Low oxygen levels inhibit decomposition, so an oxygen-poor environment, such as at the bottom of a still, shallow sea or in a burial cistern, can preserve the body. Controlled temperature and moisture levels in storage areas, along with proper freezing and chemical stabilization, can also slow down degradation and preserve organic objects like human remains.