Which File Do I Select To Add The AIR SDK To Adobe Animate?

Which File Do I Select To Add The AIR SDK To Adobe Animate?

I'm reading Adobe Animate Classroom In A Book 2021. However, the text book says to select the AIR SDK folder, when I extracted the folder, multiple files, and folders were extracted, not just 1 folder holding everything. 

These are the folders that were extracted from the zip file.