In the command tar –czf foo.tar.gz bar, what is the purpose of the f flag?

In the command tar –czf foo.tar.gz bar, what is the purpose of the f flag?

• Tells tar to read from the file that follows the flag
• Tells tar to print the name of each file as it is processed
• Tells tar to copy only files, and not directories
• Specifies extra compression is to be used
• Tells tar to write to the file that follows the flag