The Auto Selection tool was added to Adobe Photoshop Elements 2018.
This video shows how to use the Auto Selection tool and what the different options are for it. Here’s a link to a written version:
How to use the Lasso Tool in Photoshop Elements: https://youtu.be/ON-Kwr2PkUM
How to use the Quick Selection Tool in Photoshop Elements: https://youtu.be/CFioBL5mqvE?t=50s