How do I bring pictures back down from the iCloud to my iPhone?

How do I bring pictures back down from the iCloud to my iPhone? - 1

You don't. ICloud is a *sharing* service not a photo backup service. If the photos is not on your phone, it is not in iCloud. If you delete it on your phone, you also delete it on iCloud.

The exception to the above statement is if you have done a full backup of your phone to iCloud, which would include everything on your phone including photos, you have to do a full restore to get the photos back.

If you are looking for recently deleted photos, go to the Recently Deleted album in your Photos app.

If you want a true photos backup service, use the Google Photos app, which is free.

Download them.