Need help to understand these things

Question

I can't understand any of these. These are not look like HTML5. can anyone help me to understand this?

https://www.sololearn.com/learn/HTML/2197/

Answer 1

what you want to say all those things which are available in html are also available at W3C and SL also use Html5 so, it's impossible that they add something wrong here. if you find any bug 🪲 go to gmail and report sololearn team.