Thank you :) yes, sourcing the photos is one thing and you did it correctly but photos in internet are with different licences:

• creative commons and free-license photos can be used anywhere you want, because the author agrees to distribute them to everyone
• copyrighted photos require paying the author and asking for their permission every time we want to use the picture. In some countries using it without permission is considered as a crime equal to stealing and on Steemit it's not allowed as well.

Photo is a product of photographer's work as well as bread is the product of baker or clothes of the designer. It's well described in the link I attached to my first comment :) you will find there also the list of the websites where you can find creative commons pictures.

Have a great day and once again - thanks for the edition!