Hi @doski,

I suggest you go to https://www.google.com/imghp?hl=en, enter your search term, say, "Avatar The Last Airbender" and then on the results page click on "tools" button =>"Usage Rights" => "Creative Commons Licenses." Google will then display all the truly free images for your search term. Use only these images.

The images you have used are not free to use images. Besides you have provided only secondary sources (google, pinterest etc) and not the original sources of the images.

If you follow the attribution format recommended by Creative Commons your articles will attract more respect and my support.