Which type of pressure container is described as a spherical fixed-facility?

A spherical fixed-facility pressure container refers to a type of storage tank specifically designed to hold gases or liquids at a pressure significantly above atmospheric levels. These containers are typically characterized by their spherical shape, which is optimal for withstanding internal pressures due to uniform stress distribution.

In the context of the choices provided, the bulk fixed-facility cryogenic container is designed to store cryogenic liquids at very low temperatures and elevated pressures. Its fixed nature indicates that it is permanently installed at a location and is intended for bulk storage and handling, which aligns with the description of a spherical fixed-facility container.

The other options describe different types of containers or tanks that may not fit the specific criteria mentioned. For example, intermediate bulk containers are often cube-shaped and not necessarily designed to handle high pressure, while pressure cargo tanks are more geared towards transport rather than fixed storage. Multi element gas containers are typically used for storage and transportation of gases in a modular fashion, rather than being large, fixed installations. Therefore, the bulk fixed-facility cryogenic container is the correct answer as it accurately reflects the definition of a spherical fixed-facility pressure container.