The first HTML code is <var> which defines a variable and it processes any other variable before any of the codes are executed. <hr> is our second one and it defines a thematic change in the content and is used to space out codes so that the codes don't end up together and messing everything up. <br> is the third one and it inserts a line break and it produces a line break in the coding or text. <head> is the fourth one and it contains metadata/information for the document and basically what it does is replaces the title code. <html> is the fifth one and it defines the html document and it makes or lets you have the ability to do what you do in coding and for the last one, it is <title>. Which defines a title for the document and it basically puts a title on to your coding file.