How do I make a zip file?

I' trying to send in some voice acting auditions for some projects, but they want all of the mp3s together in a zip file and... I don't know how to do that. Can anyone help me out?

Oh, and keep in mind that I have a Mac computer.

 

Right-click on it and choose "Create archive".

 

I don't see that option... :( Maybe it's because I'm using a laptop? *knows very little about computers*

 

To create a compressed file, either Control-click on the file and choose Create Archive (which is Apple-speak for “make a compressed ZIP fileâ€). Or you can click on a file, then go to the Action menu (the button that looks like a gear up in the Finder window’s toolbar), and choose Create Archive from there. Either way, it quickly creates a new file, with the file extension “.zip.†This is the compressed file. You can also compress several different files (like three, for example) into one single archive file — just Command-click (or Shift-click contiguous files) on all the files you want included, then choose Create Archive of X Items from the Action menu. A file will be created named “Archive.zip†(that’s it!).

I got that from the Apple website: Link.
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Ah, thank you so much! I got it :)