Which of the following file organization is most efficient for a file with a high degree of file activity?

The most efficient file organization for a file with a high degree of file activity is typically a Direct or Hashed file organization. This type of organization provides the fastest access to individual records, making it ideal for highly active files where records need to be quickly retrieved, updated, or added. Direct access allows an application to go directly to the record without having to search through other records, significantly reducing access time and enhancing performance.