If I were to ask why doesn't br have a closing tag?

Answer 1

The closing and opening tags are like brackets around the content, the <br/> tag doesn't have any content in it, it can have content before it and content after it, but not in it, so it doesn't act like a bracket.

Answer 2

BR tag doesnt have any content therefore it cannot have any associated opening and closing tags

Answer 3

because its haven't open tag

Answer 4

It doesn't have any content for it. All it does is make the rest of the text on a new line, therefore it does not need a closing tag.