Hi, informative post, could you give us better specs on the reference you consulted?

I see you did not post a web link where we can verify the source consulted.

We also need you to give us a better specification of the image sources to verify if the images are in the public domain which are those found for example in the pixabay page, if you have doubts about this I recommend you to read this post which explains the guidelines for preparing a post in the heartstem community:

https://steemit.com/hive-106951/@carlos84/how-to-write-a-stem-content-post-in-the-heart-steem-community

Regards