I think that in the given case you should "Try it yourself" or a src attribute better explain!

Question

https://code.sololearn.com/WrADvW4oQoI2/?ref=app

Answer 1

src is the path to a file. It can either be on the local system in which case it would be something like /images/avatars/bob.png"
or it could be on a remote system in which case it's a full url.
You can't host images on SoloLearn so in order for them to display on your code here you need to upload them to a hosting service like imgur and use the image link they provide.