Which of the following refers to a type of seal that uses air to create closure?

The term that refers to a type of seal which uses air to create closure is an air seal. Air seals are designed to create an airtight barrier, preventing the passage of air and contributing to the overall preservation and protection of the contents within a given enclosure. In the context of mortuary practices, air seals can be critical in maintaining the integrity of caskets and containers, ensuring that the environment within is properly regulated.

This is particularly important for the preservation of the deceased and can help in delaying the natural decomposition process. While other types of seals, such as earth seals or seals based on positioning (like top or bottom seals), serve different purposes and utilize various methods for closure or protection, they do not specifically utilize air to achieve their sealing properties. Thus, the definition and function of an air seal distinctly align with its use of air in the sealing process.