Hello, just to assist you improve in writing stem post.
The image used is not from free sources.
Your can get free images for use from
https://commons.m.wikimedia.org/wiki/Main_Page
Pixabay etc.
You can also improve your writing skills by reading already curated ones by Stemsocial. This you can find from stemng and Stemsocial distilled post.
Weldone.