Which of the following file types is used to consolidate a group of files?

.rtf (Rich Text Format) is a document file format used for text documents and does not consolidate groups of files.

.m3u is a computer file format for a multimedia playlist and does not consolidate the actual media files themselves.

.avi (Audio Video Interleave) is a multimedia container format for storing video and audio data, not for consolidating groups of disparate files.

The .rar file type is a proprietary archive file format that supports data compression, error recovery, and file spanning. It is commonly used to consolidate multiple files and directories into a single compressed archive, which can then be easily stored or transferred.