Which of the following is a type of search that involves checking the body for concealed items?

The type of search that involves checking the body for concealed items is a body cavity search. This search is typically performed when there is a reasonable suspicion that an individual may be concealing illegal items within a body cavity, which may include the rectum or vagina. Body cavity searches are conducted under strict regulations and guidelines to respect the individual's rights and dignity, as well as to ensure the safety and security of the facility.

In contrast, a frisk search primarily involves a pat-down of the outer clothing to find weapons or other contraband but does not involve checking body cavities. A strip search involves the removal of clothing but is not as invasive as a body cavity search and typically does not explore internal body areas. A field search generally refers to searching areas outside of a controlled environment, such as an open area or a vehicle, rather than searching the body itself. Each type of search has its specific procedures and legal implications, which helps define their differences and proper contexts for execution.