There are no free images in Adobe Stock. However if you go to Fotolia.com which is also owned by Adobe you can sign up for a free account there and access free images. I can't vouch for the quality but I am sure you may find some useful ones.
Thanks for the help. I tried the Fotolia site but it seems that all the free images are watermarked and if I subscribe it will cost anywhere from $239 to $2,361. Don’t get me wrong I do have sources for free images I just through I would get better quality and a larger variety through PS. Thank you for your help. Let me do you a favor, here is a website that I found to be very good Freeimages.com
John A. Morro