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I did not take a sentence from the site you mentioned

Sometimes cheetah makes mistakes. Don't worry about it.
However, there is an issue regarding the 2nd image. It is licensed as CC BY-NC-SA 2.0. This license does not permit use for commercial purposes and since you're making money from the post you cannot use it.

thanks @bachuslib
I think www.flickr.com can we copy freely like pixabay.com
I will fix it

No, flickr is not like pixabay, pexels, pxnio or pixhere. Always check the licenses to see if an image is free for commercial purposes. :D

Oke. I will be more careful for the next
Thanks @ruth-girl
:D