i am not getting question
what i have to write.
<!doctype> <html> <head> </head> <body> </body> </html>
I don't took the HTML course yet. However my HTML experience says, that you should define what kind of doc*type* your document is.
You can find more information here: https://www.w3schools.com/tags/tag_doctype.asp
So, you should write <!doctype HTML>
This should do it:
<!DOCTYPE html> <html> <head> <title>Hello World!</title> </head> <body> <p>You were mistaken on HTML doctype declaration.</p> </body> </html>